International WORKSHOP on ``Emerging trends in High Energy and Condensed matter Physics"

Asia/Kolkata
Department of Physics, GDC, Budgam, J&K, India
Description

Department of Physics, GDC, Budgam, J&K, India is organizing (ONLINE) Workshop on "Emerging trends in High Energy Physics and Condensed matter Physics"

The purpose of this Workshop is to give participants an opportunity to present results and discuss various aspects of the High energy physics and Condensed matter Physics.

This meeting will allow the experts from different fields to exchange ideas that have over the years been at the forefront of these  disciplines.

 

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TOPICS TO BE DISCUSSED

 

High Energy Nuclear and Particle Physics

  • Strongly-interacting matter at finite temperature
  •  QCD phase structure at non-zero baryon density
  • QCD phase diagram under strong external magnetic field
  • QCD phase diagram in astrophysics
  • Transport phenomena and related issues
  • Experimental results and future facilities
  • Theoretical ideas and experimental searches of the critical point
  • Inhomogeneous phases in strongly interacting matter
  • QCD phase structure with chiral imbalance
  • QCD equation of state and Neutron stars
  • Particle production in Heavy Ion Collisions at RHIC, LHC
  • Rapidity and Transverse distributions of particles at various Collision energies
  • High Multiplicity phenomenon in Heavy Ion Collisions
  • Multifractal analysis of Photon multiplicity distribution
  • Standard Model and Beyond
  • CP violation

Cosmology

  • Fundamental Theory and Cosmology. ...
  • Critical tests of the inflationary paradigm. ...
  • Gravitational waves and signatures of the early Universe. ...
  • Mutability of the laws of physics. ...
  • Black Holes. ...
  • Other research: dark energy and dark matter.

Condensed Matter Physics

  • high temperature superconductivity.
  • strong correlations.
  • topological phases of quantum matter.
  • quantum magnetism.
  • Bose-Einstein condensates.
  • nanostructures.
  • quantum computing.
  • synthesis of new quantum materials.

 

Advisory Committee

Prof. Zahida Naseem (Principal, GDC, Budgam, Kashmir, J&K, India) {Chairperson of the Organizing Committee}

Prof. Saeed Uddin (Department of Physics, Jamia Millia Islamia, New Delhi, India)

Roman Zhokhov (Institute of High Energy Physics, Protvino, Moscow, Russia)

Rameez Ahmad Parra (Department of Physics, Jamia Millia Islamia, New Delhi, India)

Dr. Saleem Yousuf (Department of Physics, GDC, Budgam, J&K, India)

Dr. Zaheer Abbas (Department of Physics, GEC, Jahanabad, Bihar, India)

Dr. Waseem Bashir (Department of Physics, GDC, Budgam, J&K, India)

Hamid Nanda (Department of Physics, Jamia Millia Islamia, New Delhi, India)

Rasheed Ahmad (Department of Physics, KGK (PG) College, MJP, Rohilkhand university, India)

Dr. Surendra Pratap (Department of Physics, Central University of Himachal Pradesh, India)

Structure of the workshop

Two sessions with 4-5 invited talks of 25 + 5 minutes duration will be arranged every day.

The question answer session will be held after every presentation for 5 minutes in which speaker can address the question posed.

 

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Important Dates

  • January 11, 2021 - end of Registration
  • January 04, 2021 - end of abstract submission
  • January 11, 2021 - start of workshop

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Please, send us  your abstracts on bashir_waseem@yahoo.com  or directly at https://indico.ihep.su/event/577.

Please, inform organizing committee about any changes in the abstract and presentation.

The participants are advised to keep presentation of their talk ready for sharing on Zoom platform.

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Participation

Participation with talks is by invitation of the Organizing Committee.
In the case of a proactive request the decision is made by the organizing committee.

The sessions will be online by zoom. The link will be sent to all the participants and posted on the site.

There is no registration fee.

Advertised via:   https://www.conference-service.com/conferences/in/high-energy-physics-and-accelerators.html

 

Registration
Registration Form
Participants
  • Aadesh Prajapati
  • Ab Mateen Tantray
  • Abdessamad Didi
  • Abhijit P. Sarode
  • Abhishek Kumar
  • Abida Bashir
  • Ahmad Ahmad
  • Amit Kumar
  • Anshul Singhal
  • ARIJIT CHAKRABORTY
  • ASHUTOSH TIWARI
  • Athar Ahmad
  • Bhavesh Sirvi
  • DAMINI SINGH
  • Danish Farooq Meer
  • Debasish Das
  • DEEPAK SAH
  • Dharmendra Yadav
  • Evita Merin Xavier
  • FATIN FARHANA AWANG
  • Gabriya L R
  • Gaurav Sapkal
  • Gobinda Soni
  • Gregory Johnson
  • Hamid Nanda
  • Hamid Nanda
  • Haowu Duan
  • Harish Madival
  • HIMADRI PARASHAR
  • Inamul Bashir
  • Iqbal ahmad Shah
  • ISHFAQ AHMAD RATHER
  • JUHI VARDANI
  • KARAM CHAND
  • Kavita Negi
  • Kayleigh Mathieson
  • KHURSHEED PARREY
  • Koti Kunja
  • Krishna Kumar
  • Madan Singh
  • MAHESH GAURAV YADAV
  • Majid Yousuf
  • MANOJ KUMAR
  • Matridutt Sharma
  • Mazen Ali
  • Meenal Chauhan
  • MEGHNA RATHORE
  • MEGHNA RATHORE
  • Mijas Tiwari
  • Mir Hashim Rasool
  • Mohamed Housni El Moubaraka Ben Abdou Chakour
  • MOHD ABUSHAD
  • Mohd Sadiq
  • Mohsin Khan
  • Mudasir Farooq
  • Mudasir Farooq
  • Mukesh Suthar
  • Muneeb Mushtaq
  • Munerah alrashed
  • Mursaleen Nazir
  • Naila Islam
  • Navdeep Kaur
  • Nazama Kouser
  • Neelu Mahajan
  • Nidhi Mehta
  • Nikhil Hatwar
  • Nobel Hajare
  • PARVATHI P
  • Payal Roy
  • Payal Roy
  • Ponsudana Muthuraj
  • Pooja Sharma
  • Preeti dahiya
  • Preeti Kumari
  • PRIYA SHARON J
  • Ragul Nagarajan
  • Rahmat Rahmat
  • Rameez Ahmad Parra
  • Rashed Hussain Lone
  • Rasheed Ahmad
  • Reena Rani
  • Renu Dhayal
  • Roman Zhokhov
  • Saleem Yousuf
  • SAMANDEEP SHARMA
  • Santy M Thomas
  • Shabir A. Mir
  • Shalu Sharma
  • Shih-Yen Tseng
  • Shoaib Nazir
  • Sina Etebar
  • Smritimoy Chakraborty
  • Sonia Rani
  • Suhail Ahmad
  • Suman Mondal
  • Suraj Kumar Rai
  • Surender Pratap
  • Surender Pratap
  • Suvas Chandra Chaudhary
  • Syed Mubashir Ahmad
  • Tahir Murtaza
  • THOUNAOJAM PUNSHILEMBI
  • Ubaid Manzoor
  • Ubaid Tantary
  • Umair Ashraf
  • Umesh Bhakar
  • waseem bashir
  • YAWAR ALAMGEER
  • Yogendra K B
  • ZAHEER ABBAS
Waseem Bashir
  • Monday, 11 January
    • 11:30 12:00
      opening cermony (Principals Address + Subject Expert + Converener Research + Organizer) 30m

      Address + Subject Expert + Converener Research + Organizer)

      Speaker: opening cermony
    • 12:00 12:30
      "Leptons from HF decays : Measurements and Inferences" 30m

      In this talk I shall be covering on the selected results from LHC and RHIC. I shall be covering spectra and correlations (flow) and also nuclear modification factor. I shall be discussing quarkonia flow in further detail. Due to the larger mass of the bottomonium states compared to the charmonium ones,the measurement of bottomonia production in proton-nucleus collisions allows a study of CNM effects in a differentkinematic regime, therefore complementing the J/Psi studies[1].For smaller systems like p+A and p+p we have less deeply bound bottomonia states and thus a comparatively larger chance to escape. This means that more states become measurable, which is a positive feature. On the other hand,it also means that the escape mechanism which underlies the anisotropic flow of bottomonia may become largely ineffective, in particular for the Upsilon(1S). Accordingly,the measurement of a sizable flow for Upsilon(1S) in small systems[1] would probably hint at the importance of initial-state correlations. Hence understanding small systems becomes very important and such studies will be also stressed and presented.[1] D. Das and N. Dutta, Int. J. Mod. Phys. A 33, no. 16, 1850092 (2018)

      Speaker: Debasish Das (Saha Institute of Nuclear Physics)
    • 12:00 14:00
      Chairperson: Waseem Bashir 2h
    • 12:30 13:00
      Exploring axial U (1) restoration in a modified 2+1 flavor Polyakov quark meson model 30m

      Exploring axial U (1) restoration in a modified 2+1 flavor Polyakov
      quark meson model
      Suraj Kumar Rai a,∗ , Vivek Kumar Tiwari a
      a
      Department of Physics, University of Allahabad, Prayagraj,India,211002.
      E-mail: surajrai050@gmail.com, vivekkrt@gmail.com
      Topic(s): Strongly-interacting matter at finite temperature
      Abstract: We report on the U A (1) symmetry restoration resulting due to temperature dependence of
      the coefficient c(T ) for the Kobayashi-Maskawa-’t Hooft determinant (KMT) term in a modified 2+1 flavor
      Polyakov loop quark meson model having fermionic vacuum correction term (PQMVT). Temperature depen-
      dence of KMT coupling c(T ) drives the non-strange condensate melting to significantly smaller temperatures
      in comparison to the constant c case. Further due to c(T ), m η 0 decreases from its vacuum value by 220 MeV
      near T=176 MeV after the chiral transition (T c χ = 154.9 MeV). This is similar to the η 0 in-medium mass
      drop of at least 200 MeV as reported by Csorgo and Vertesi in Ref [Csorgo, Vertesi], as an experimental
      signature of the effective restoration of U A (1) symmetry. The pseudoscalar mixing angle θ p achieves anti-
      ideal mixing in the influence of c(T ). The η meson becomes light quark system (η N S ) at T=176 MeV and
      changes its identity with η 0 meson which becomes strange quark system (η S ). The degenerated temperature
      variations of σ, π meson masses merges with the temperature variations of the masses of degenerated a 0 , η
      mesons near 275 MeV. It means that for c(T ) when m σ = 400 MeV, the U A (1) restoration takes place at
      1.75 T c χ =275 MeV.

      Speaker: Suraj Kumar rai (University of Allahabad)
    • 13:00 13:30
      Dualities in three color and two color QCD phase diagram 30m

      Dualities in three color and two color QCD phase diagram

      Speaker: Dr Roman Zhokhov (Institute of High Energy Physics, Protvino,Moscow, Russia)
    • 13:30 14:00
      GW190814 secondary component as Neutron star with Hadron-Quark phase transition. 30m

      GW190814 secondary component as Neutron star with
      Hadron-Quark phase transition.
      Ishfaq Ahmad Rather
      ishfaqrather81@gmail.com
      Department of Physics, Aligarh Muslim University,
      Aligarh-202002, India.
      The recently observed gravitational wave event GW190814 has a secondary com-
      ponent with a mass in the range 2.50-2.67M , which lies in the mass gap region
      raising the question as whether it is a supermassive neutron stars or a light
      black hole. In this context, I study the properties of the Neutron star(NS) with
      Hadrons along with a Phase transition to Quark matter. The NS properties
      are calculated using the density-dependent relativistic mean-field model (DD-
      RMF) for the hadronic matter . The Quark matter is studied by employing
      the Vector-Enhanced Bag model (vBag). The phase transition properties of the
      mixed Equation of State (EoS) are studied using both Maxwell and Gibbs mech-
      anisms. The maximum mass of neutron star with the used DD-RMF parameter
      sets is found to be around 2.55M for pure hadronic phase and around 2M for
      hadron-quark mixed phase using both Gibbs and Maxwell construction. The
      tidal deformability for the hybrid EoS at 1.4M , Λ 1.4 , remains unchanged from
      the pure hadronic EoS with Maxwell construction, but decreases with the in-
      creasing neutron star mass for Gibbs construction. Thus while the pure hadron
      matter EoS satisfies the mass constraint from recently observed GW190814 data,
      the star matter properties for the hadron-quark phase transition satisfy the con-
      straints from the recent observations GW170817. Therefore, we cannot exclude
      the possibility of the secondary object in GW190814 as a neutron star composed
      of hadrons and quarks.

      Speaker: Ishfaq Rather (Aligarh Muslim University)
    • 14:00 14:30
      BREAK 30m
    • 14:30 16:00
      Chairperson: Rameez Ahmad Parra 1h 30m
    • 14:30 15:00
      Neutrinos: Dirac or Majorana 30m

      Abstract
      Neutrinos: Dirac or Majorana
      Neelu Mahajan
      Goswami Ganesh Dutta S.D. College, Sector 32-C, Chandigarh, 160030, India
      email id: neelu.mahajan@ggdsd.ac.in

      To understand the origin of small neutrino mass, a question arises whether neutrinos are Dirac or Majorana particles? This is one of the most fundamental problems of the modern day neutrino physics. For this, we are considering bottom up approach i.e. to go for phenomenological models which are in tune with the latest precise data. Texture specific mass matrices have been phenomenologicaly analyzed for both Dirac and Majorana neutrinos. If neutrinos are Majorana particles, neutrinoless double beta decay would occur. We outline here how the present knowledge of mixing angles and mixing matrix elements could help to determine the nature of neutrinos. Along with this, several quantities such as neutrinoless double beta decay ⟨mee⟩, Jarlskog's rephasing invariant parameter in the leptonic sector Jl and the corresponding Dirac like CP violating phase have been calculated.

      Keywords

      Texture specific mass matrices, Dirac and Majorana Neutrinos, Neutrinoless double beta deacy , CP violation

      Speaker: Neelu Mahajan (Goswami Ganesh Dutta S.D. College, Sector 32-C, Chandigarh, 160030, India)
    • 15:00 15:30
      Tracker Equation For Cosmological Tracking Solutions 30m

      Tracker Equation For Cosmological Tracking Solutions
      Zaheer Abbas
      Department of Physics
      Government Engineering College Jehanabad
      ABSTRCT
      The energy content of the universe may be supplemented by quintessence as
      a slowly- rolling scalar field. The understanding of tracker fields enables us to
      avoid the initial condition i.e. at the early age of the universe, match for the
      scalar and matter field which is very sensitive for the present observed ratio
      of their energy density nearly same today, as first one has very slow
      decreasing energy density than the last one. Quintessence [1] is considered
      to be missing energy component required to supplement the baryonic and
      matter density to achieve the critical density. [2, 3] This energy component
      has negative pressure with dynamical character and distributed in-
      homogeneously with slow time evolution. A form of quintessence called
      tracker fields has been introduced which avoids the coincidence problem [4].
      We have calculated tracker function  other than [5] and looking for its
      implication.

      Speaker: zaheer abbas (Department of Physics Government Engineering College Jehanabad)
    • 15:30 16:00
      Particle Production and Semiclassical Validity in Two-mode Squeezed Vacuum state of an Oscillatory Quantize Scalar Field in FRW Universe 30m

      Abstract
      An approximate solution to the semiclassical Einstein equation is obtained in two-mode
      squeezed vacuum (TMSV (|ξ 2 >)) state formalism perturbatively and is found to obey the same
      power-law expansion as that of classical Einstein equation. However, the semiclassical gravity
      shows a significant difference that the Hubble constant does not oscillate, in contrast with the
      oscillatory behavior observed in classical gravity, for a specific choice of squeezing angle. This
      coherently oscillating scalar field in the TMSV state suffers from the phenomenon of
      nonclassical particle creation due to the quantum fluctuation of the scalar field in the
      expanding background cosmology. We also analyzed the validity of the semiclassical theory in
      TMSV state and finally examined the nonclassicality of the above state in the oscillatory phase
      of a massive scalar field.
      Keywords: Scalar Field, Two-mode Squeezed Vacuum State, FRW Universe, Semiclassical
      Approximation to gravity, quantum fluctuation, particle creation.

      Speaker: Meghna Rathore (MNIT)
    • 16:00 16:30
      Discussion Session For Day-1 30m
    • 16:30 17:20
      Concluding Remarks, Day-1 (Organizer) 50m
  • Tuesday, 12 January
    • 11:20 11:30
      Session Opening Remarks (Organizer)-Day-2 10m
    • 11:30 12:00
      CALCULATING LEPTONIC CP INVARIANCE FOR FRAMPTON-GLASHOW AND YANAGIDA (FGY) MODEL 30m

      In the present paper, I revisit the relationship between the weak basis invariants (WB) related to CP violation responsible for leptogenesis and CP violation relevant at low energy. To this end, for all the four experimental viable cases pertaining to Frampton-Glashow and Yanagida (FGY) model, I reconstruct the WB invariants in terms of left-handed Majorana neutrino mass matrix elements, and thus finding the necessary and sufficient condition for CP invariance at high energy. Further for all the viable cases, I have shown the explicit dependence of WB invariants on Dirac type and Majorana type CP violating phases. In the end, I discuss the implication of such interrelationships on leptogenesis.

      Speaker: Madan Singh (*Department of Physics, M. N. S Government College, Bhiwani, Haryana, 127021, India.)
    • 11:30 13:30
      Chairperson: Zaheer Abbas 2h
    • 12:00 12:30
      A Quest for Unique Texture in Quark Mass Matrices 30m

      A Quest for Unique Texture in Quark Mass Matrices
      Samandeep Sharma
      GGDSD College, Sector 32-C, Chandigarh
      Email: samandeep.sharma@ggdsd.ac.in
      Abstract: We start with the most general quark mass matrices within the framework of Standard Model and apply the ideas of ‘naturalness’ and ‘weak basis transformations’ within the texture zero approach. Our analysis leads us to an interesting conclusion, viz. a particular texture four zero structure seems to be the unique viable option for explaining the present quark mixing data.

      Speaker: samandeep Sharma (GGDSD College, Sector 32-C, Chandigarh)
    • 12:30 13:00
      Mass Matrices And Sterile Neutrinos : an Overview 30m

      Mass Matrices And Sterile Neutrinos : an Overview

      Preeti, Neelu Mahajan, Samandeep Sharma
      GGDSD College, Sector 32-C, Chandigarh, India
      *corresponding author: dahiyapreetz1991@gmail.com

      Neutrino oscillation experiments have provided solid evidence that, in contrast to the prediction of the Standard Model (SM), neutrinos are massive and that their flavors change during propagation.Despite the victorious accomplishment of solar, atmospheric, reactor and accelerator neutrino experiments, there are experimental anomalies that cannot be explained within the standard three active neutrino framework. In particular, the possible presence of sterile neutrinos points towards non-standard neutrino physics. The issue of the LSND and MiniBooNE results has been around for some time, and is frequently interpreted as a hint towards the presence of one or two sterile neutrino states. To solve sterile neutrino problem, there can be so many approaches like hybrid textures, zero determinant, zero trace, seesaw mechanism, radiative mechanism but particularly we emphasize our work by using texture specific mass matrices. We prepare an overview of all the examination that hints beyond standard model. A brief summary of the past, present and future neutrino experiments are also presented.

      Keywords: Neutrino oscillations, anomalies, sterile neutrinos, hybrid texture, texture specific mass matrices.

      Speaker: preeti dahiya ( GGDSD College, Sector 32-C, Chandigarh, India)
    • 13:00 13:30
      Information loss problem and possible solutions 30m

      The Information loss problem has engaged physicists over a long time now with varied points of
      view whethër information is lost when it enters the black holes or otherwise. Recent Proposals of
      AMPS, EP=EPR and other proposals are attempt to address the problem with renewed view points
      which conflate or complement some of earlier solutions. In this talk attempt would be made to
      address how the problem has evolved historically and logically and possible pointers towards its
      resolutions

      Speaker: Suhail Ahmad (Central university of Kashmir)
    • 13:30 14:00
      Break-I 30m
    • 14:00 15:30
      Chairperson: Saleem Yousuf 1h 30m
    • 14:00 14:30
      Thermal Model Calculations for Hot and Dense Hadronic Matter Using Van der Waals Type Equation of State 30m

      We have provided a modified grand canonical ensemble formulation for a multi-component hadronic resonance gas system. We have considered the attractive as well as repulsive interaction among the constituent baryons (antibaryons) and obtained a van der Waals type equation of state. Using this formulation we have calculated several relative hadronic yields as well as nucleon (antinucleon) densities in the system. This approach is thermodynamically consistent. It is found that the particle ratios get significantly modified in the case of van der Waals interactions for a baryon rich system. In this approach the repulsive force is assumed to exist between pairs of two baryons and pairs of two antibaryons, while it is purely attractive between a baryon-antibaryon pair. The values of attractive and repulsive parameters have been obtained from the previous studies which are required to reproduce the ground state properties of nuclear matter. We have also studied the effect of the variation of these parameters on our results.

      Speaker: Rameez Ahmad Parra (Department of Physics, Jamia Millia Islamia, New Delhi)
    • 14:30 15:00
      NJL Model and QCD phase transition 30m

      Quantum Chromodynamics (QCD) Matter Under Nambu-
      Jona–Lasinio (NJL) Model and Phase Transition Temperature
      Quantum Chromodynamics (QCD) is one of the fundamental and ultimate theory of strong
      interactions. It describes the interaction of quarks through their colour quantum numbers
      called colour charges. The mediating particles are gluons which are called gauge bosons with
      spin-zero particles and are massless. QCD deals with two extreme forms of matter in two
      phases. One heated to trillion degrees called QCD quenched and other maintained at zero
      temperature labelled as QCD vacuum. Low energy QCD deals with systems of light quarks
      where energy and momentum scales are smaller than 1 GeV mass energy gap observed in
      hadron spectrum. Right after the Big Bang, quarks and leptons were mass-less. When the
      temperature of the universe dropped below 100 GeV, the spontaneous breaking of the
      electroweak symmetry resulted in Higgs particles condensing in the vacuum, this "Higgs
      mechanism” gave mass to leptons and quarks. With further cooling, once the temperature
      dropped below 100 MeV, the quarks and gluons became confined in protons and neutrons.
      The QCD vacuum was modified by the spontaneous breaking of chiral symmetry giving the u
      (up) and d (down) quarks in the nucleon an "effective" mass of some 300 MeV. This
      constituent mass of the quarks is different from their current mass. The Higgs mechanism is
      only responsible for ~2% of the mass of the nucleon, QCD dynamically generates the
      remaining 98% of the mass of ordinary matter. At low energy scale which is also relevant for
      conventional nuclear physics, QCD exhibits two important features. One is called the color
      confinement and other is approximate chiral symmetry and its spontaneous breaking. In case
      of physical quark masses neither chiral condensate vanishes nor chiral susceptibility diverges
      at the pseudo-critical temperature. In spite of this these quantities retain a reminiscent
      behaviour of them corresponding to one in the chiral limit. In particular the chiral
      susceptibility has a peaked structure as a function of temperature and it is customary to define
      critical temperature as the temperature for which susceptibility reaches its peak.
      Hamid Nanda (Jamia Millia Islamia New Delhi)
      PhD in Theoretical High Energy Nuclear Physics

      Speaker: Hamid nanda (Jamia Millia Islamia)
    • 15:00 15:30
      Bulk viscosity near QCD phase transition and spontaneous symmetry breaking effect 30m

      Bulk viscosity near QCD phase transition and spontaneous
      symmetry breaking effect
      Waseem Bashir 1 , Hamid Nanda 2 , Rameez Ahmad Parra
      2,3
      3
      1
      Department of Physics, GDC, Budgam, Kashmir -191111, India.
      Department of Physics, Faculty of Natural Sciences, Jamia Millia Islamia, New Delhi-110025,
      India.
      Abstract
      We evaluate the effect of spontaneous symmetry breaking on the transport properties of
      strongly interacting fermionic matter near QCD phase transition. We develop a field theoreti-
      cal model using dynamic quasi-particle description for fermions which are allowed to interact with
      Nambu-Goldstone modes via Yukawa type coupling. We solve this model at Wilson-Fisher fixed
      point and evaluate perturbative expression for bulk and shear viscosity of this medium. To analyze
      the behaviour of these transport coefficients near QCD phase transition region we use scaling anal-
      ysis. It is found that Nambu-Goldstone modes can result in singular behaviour of bulk viscosity
      to entropy ratio ζ/s in the Z(2) universality class.

      Speaker: Waseem Bashir (GDC,BUDGAM)
    • 15:30 15:45
      Break-II 15m
    • 15:45 18:15
      Chairperson: Hamid Nanda 2h 30m
    • 15:45 16:15
      Magnetotransport and magnetocaloric effect in Gd3In 30m

      The electrical transport and magnetic properties of the rare-earth based binary intermetallic compound Gd3In are reported. The sample has tetragonal crystal structure with space group P4/mmm. At TC = 190 K, the sample orders ferromagnetically, however, a recentrant antiferromagnetic-like state is observed below TN = 100 K where a sharp drop in magnetization is observed. Clear signature of meta-magnetic transition is present in the isothermal variation of magnetization for an applied field of HC= 11.5 kOe at 2 K. Due to the presence of field induced transition, we have calculated the magneto-caloric effect (MCE) around the magnetic transitions using our magnetization data, which turns out to be quite eventful. MCE, expressed in terms of change in entropy (S) due to the change in magnetic field (), is found to be negative around TC with a maximum value of S= -5.3 Jkg-1K-1 for H = 50 kOe. On the other hand, it is positive up to H = 10 kOe around TN, and turns negative for higher values of H with a maximum value of S = -2.6 Jkg-1K-1. This is clearly due to the metamagnetic transition observed around 11.5 kOe. In the temperature variation of electrical resistivity, we observe clear signatures of magnetic transitions occurring at TC and TN, and the sample shows negative magnetoresistance throughout the temperature range (6-300 K) with a value of -12% at around 90 K for H = 50 kOe.

      Speaker: Suman Mondal (Indian Association for the Cultivation of Science)
    • 16:15 16:45
      Study of Spin Polarization, Fermi Surface, Band Structure and Thermophysical Properties of Sc 2 ZrSi Inverse Heusler 30m

      Study of Spin Polarization, Fermi Surface, Band Structure and
      Thermophysical Properties of Sc 2 ZrSi Inverse Heusler
      Dr. Saleem Yousuf and Dr. Waseem Bashir
      Department of Physics, Govt. Degree College Budgam, J&K, India
      E-mail: sosfizix@gmail.com a , nguyenphys79@gmail.com b
      Abstract
      The origin of half-metallicity, spin behavior, thermoelectrics and thermodynamics of inverse full-
      Heusler Sc 2 ZrSi alloy are explored using the by density functional theory. The structural
      characterization using the calculation of ground state energy confirm the XA-type structure of
      Heusler having similarity with Hg 2 CuTi-type structure that has F-43m space group
      symmetries.Band structure and occupation of density of states at the Fermi level determine its
      semiconducting nature and an indirect band gap of 0.52 eV.Semi-classical Boltzmann transport
      theory is used to determine various thermoelectric coefficients to infer about its capability for
      waste heat recovery systems.The Seebeck coefficient and electrical conductivity measurements
      also convey semiconducting band structure over all chemical potentials.The thermoelectric
      efficiency measured through zT calculation with a value of 0.5 at 1200 K, convey the material can
      be used as thermoelectric material.The thermodynamics using Debye temperature, specific heat
      and thermal expansion coefficient define low anharmonicity and low lattice thermal conductivity
      of the material. The overall thermophysical assets suggest the material has a potential stand for
      spintronics and thermoelectric applications.

      Speaker: saleem yousuf (Department of Physics, GDC,Budgam)
    • 16:45 17:15
      Band gap engineering of barium stannate (BaSnO3) perovskite oxide by Mn-doping: Theory and experiment 30m

      Band gap engineering of barium titanate (BaSnO3) perovskite oxide by Mn-doping: Theory and experiment

      Ishtihadah Islam1, Shakeel Ahmad Khandy2, Azher Majid Siddiqui1, Aurangzeb Khurram Hafiz3
      1Department of Physics, Jamia Millia Islamia, New Delhi 110025
      2Department of Physics, National Taiwan University, Taipei, Taiwan
      3Centre for Nanoscience and Nanotechnology, Jamia Millia Islamia, New Delhi, 110025, India
      ishtihadahislam@gmail.com

      ABSTRACT
      Nanocrystalline BaSn1-xMnxO3 (x = 0.0 - 0.3) nanostructures were synthesized by solid state reaction route. Heavy Mn-doping upto 30% in powdered BaSnO3 is accomplished to investigate the optical properties, electronic structure and magnetic properties of the synthesized samples. From XRD analysis and Transmission electron micrographs (TEM), nanoscale cubic structures are observed within (~50 nm) dimensions. Band gap transition from 3.2 eV in pure BaSnO3 to 2.6 eV in Mn-doped samples is coherent with DFT calculations. So, an ultraviolet active material is reduced to absorb the visible light via band gap engineering as achieved by proportional Mn-doping in the parent material. An increase in Mn-content leads to the decrease in band gap of parent material up to certain limits (20% doping only). The origin of these reduced values can be argued from the unpaired Mn-3d5 electronic states which induces the defect states below the conduction band minima near the Fermi level. The more, defect states present in a sample, the smaller will be its band gap. However, after certain doping (optimal 20% in present case), the distortion effects in the crystal structure does not allow further alteration of the band gap but induce magnetism only.

      Keywords: BaSnO3; Nanoparticles, XRD, Transition metals, Optical properties

      Speaker: Ishtihadah Islam (Jamia Millia Islamia)
    • 17:15 17:35
      Fano factor & Conductivity in the confined region of the potential well 20m

      Transport properties in the confied region of the potential well have been calculated. It has been
      shown here that edge states or surface states occur in this particluar system. Tight binding Green
      function along with Bloch’s theorem used here to calculate the transport properties. Transmission
      occurs in the form of plateus and shows the metallic behavior. Fano factor has been calculated in
      this system. Conductivity is also calculated for this particular system

      Speaker: Dr Surendra pratap (Department of Physics, Central university of Himachal Pradesh)
    • 17:35 17:55
      Polymer Nanocomposite Electrolyte Films For Energy Storage/Conversion devices 20m

      The conducting polymer nanocomposite electrolytes free standing thin films are used in
      technologically interesting due to the wide variety of applications Such as ; batteries, solar
      cell , electrochemical sensors and supercapacitors etc [1-2]. The conducting polymer
      nanocomposite electrolytes thin films have been prepared by standard solution cast technique.
      The prepared free standing films were characterized by different tool of characterizations
      technique such as EIS, FTIR, and SEM. The basic requirement of polymer nanocomposite
      electrolyte films are high ionic conductivity is approx.of order 10
      -2 to 10-4 S/cm-1 .FTIR spectroscopy is an important technique for the analysis of bond formation in the polymer structure, since it provides information about the complexation of blend polymer with sodium ion and interaction in the prepared films [3-4]. The surface morphology of polymer nanocomposite electrolyte films by scanning electron microscopy (SEM). The cyclic
      Voltammetry of polymer nanocomposite electrolytes films were calculated by electrochemical stability window (ESW) by using an electrochemical analyzer.

      Speaker: Mohammad Sadiq (, Department of Physics, A R S D College, University of Delhi, India)
    • 17:55 18:15
      Recent Advances and Challenges in Compton Scattering from Heavier Metals 20m

      As Compton scattering is a powerful technique for the determination of electronic structure of ma-
      terials, with the advent of high resolution in spectrometers, in the past two decades. Several mea-
      surements on single crystal materials have been carried out to determine electron momentum distri-
      bution using this technique. In this paper, I present a review of such studies on heavier metals and
      emphasis is made towards the challenges encountered.
      Key words: Compton scattering, Electron momentum distribution, Heavy metals, High resolution,
      Single Crystals

      Speaker: Dr M.D Sharma (Department of Physics, Govt. Dunger College, Bikaner, Rajasthan )
    • 18:15 18:25
      Discussions Session For Day-2 10m
    • 18:25 18:55
      Feedback (Participants) 30m
    • 18:55 19:45
      Concluding Remarks (Organizers) 50m
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