Department of Physics

Dr. Samar Layek

Assistant Professor (SG)

Academic Qualifications

PhD (Physics) 2014 from IIT Kanpur, India

Master of Science (Physics) 2008 from IIT Kanpur, India

B.Sc. (Physics) 2005 from Calcutta University, India (RK Mission Residential College, Narendrapur)

Career Graph:

  • Assistant Professor, University of Petroleum and Energy Studies, Dehradun, India (March 2022- Till Date)
  • Postdoctoral Research Associate, Institute Néel CNRS, Grenoble, France (September 2019 – December 2021)
  • Postdoctoral Research Associate, University of Cambridge, UK (May 2018 – August 2019)
  • Postdoctoral Fellow, Tel Aviv University, Israel (October 2013 – December 2017)

No. Papers published in journals: 49

No. Papers presented in conferences: 11

No. Citations: 1104 (Google Scholar)

Research Interest: Strongly correlated electron systems, High-pressure, Diamond anvil cells, Mössbauer spectroscopy, Metal-Insulator transition, superconductivity, pressure induced transition, Raman Spectroscopy, high-pressure cells, spin transition, materials under extreme condition, etc.

Area of Specialization:

  • Studies of local magnetic properties of strongly correlated systems by means of 57Fe Mössbauer spectroscopy.
  • Intriguing relationship between structural and electronic properties under extreme conditions of high-pressure, low temperature and magnetic field.
  • Design and development of different high-pressure cells for research. 
  • Pressure induced Quantum phase transition and superconductivity in strongly correlated systems

Journal Publications (SCOPUS/ SCI Index):

Peer-reviewed International Journals:

  • Electronic and structural properties of the honeycomb iridates A2IrO3 (A=Na, Li) at elevated pressures S. Layek*, K. Mehlawat, D. Levy, E. Greenberg, M. P. Pasternak, J.-P. Itié, Y. Singh, and G. Kh. Rozenberg Phys. Rev. B, 102, 085156 (2020). [Impact Factor 4.036][Cited by: 2] *Also corresponding Author
  • High-pressure structural and electronic properties of CuMO2 (M= Cr, Mn) delafossite-type oxides  D. Levy, E. Greenberg, S. Layek, M. P. Pasternak, I. Kantor, S. Pascarelli, C. Marini, Z. Konopkova, G. Kh. Rozenberg  Phys. Rev. B, 101, 245121 (2020). [Impact Factor 4.036][Cited by: 4]
  • XAS studies of pressure-induced structural and electronic transformations in FeOOH N. Trcera, S. Layek, M. Shulman, A. Polian, T. Irifune, G. Kh. Rozenberg J. Phys. Cond. Mat. 31, 325401 (2019) [Impact Factor 2.617] [Cited by: 3]
  • Theoretical and experimental evidence of a site-selective Mott transition in Fe2O3 under pressure E. Greenberg*, I. Leonov*, S. Layek, Z. Konopkova, M. P. Pasternak, L. Dubrovinsky, R. Jeanloz, I. A. brikosov, G. Kh. Rozenberg   *equal contribution Phys. Rev. X, 8, 031059 (2018) (arXiv:1706.02787) [Impact Factor 15.76] [Cited by: 32]
  • Pressure-driven collapse of the relativistic electronic ground state in a honeycomb iridate J. P. Clancy, H. Gretarsson, J. A. Sears, Y. Singh, S. Desgreniers, K. Mehlawat, S. Layek, G. Kh. Rozenberg, Y. Ding, M. H. Upton, D. Casa, N. Chen, J. Im, Y. Lee, L. Hozoi, R. Yadav, D. Efremov, J. van den Brink, and Y. -J. Kim
  • npj Quantum Materials 3, 35 (2018) (arXiv:1803.04056) [Impact Factor 9.206] [Cited by: 26]
  • Interplay between structural and magnetic-electronic responses of FeAl2O4 to a megabar: site inversion and spin crossover W. M. Xu, G. R. Hearne, S. Layek, D. Levy, M. P. Pasternak, G. Kh. Rozenberg, E. Greenberg  Phys. Rev. B, 97, 085120 (2018) [Impact Factor 4.036] [Cited by: 2]
  • Superconductor-insulator transition in fcc-GeSb2Te4 at elevated pressure B. Hen, S. Layek, M. Goldstein, V.  Shelukhin, M. Shulman, M. Karpovski, E. Greenberg, E. Sterer, Y. Dagan, G. Kh. Rozenberg, A. Palevski Phys. Rev. B, 97, 024513 (2018) (arXiv:1709.01844) [Impact Factor 4.036] [Cited by: 7]
  • Site-specific spin crossover in TiFe2O4 post-spinel under pressures to near a megabar W. M. Xu, G. R. Hearne, S. Layek, D. Levy, J. -P. Itié, M. P. Pasternak, G. Kh. Rozenberg, E. Greenberg Phys. Rev. B, 96, 045108 (2017).  [Impact Factor 4.036] [Cited by: 5]
  • Superconductivity in multiple phases of compressed GeSb2Te4 E. Greenberg*, B. Hen*, S. Layek*, I. Pozin, R. Friedman,V. Shelukhin, Y. Rosenberg, M. Karpovski, M. P. Pasternak, E. Sterer, Y. Dagan, G. Kh. Rozenberg and A. Palevski  *equal contribution Phys. Rev. B. 95, 064514 (2017) (arXiv:1605.01757) [Impact Factor 4.036] [Cited by: 11]
  • FeCr2O4 spinel to near megabar pressures: orbital moment collapse and site-inversion facilitated spin-crossover W. Xu, G. R. Hearne, S. Layek, D. Levy, J. -P. Itié, M. P. Pasternak, G. Kh. Rozenberg, E. Greenberg Phys. Rev. B, 95, 045110 (2017). [Impact Factor 4.036] [Cited by: 11]
  • Pressure induced spin crossover in disordered α-LiFeO2 S. Layek*, W. Xu, E. Greenberg, G. Kh. Rozenberg, M. P. Pasternak, Jean-Paul Itié, D. G. Merkel  Phys. Rev. B, 94, 125129 (2016). [Impact Factor 4.036] [Cited by: 6] *Also corresponding Author
  • Structural and Magnetic Properties of Dilute Ca2+ Doped Iron Oxide Nanoparticles S. Layek*, K. Rout, M. Mohapatra, S. Anand and H. C. Verma J. Nanosci. Nanotech., 16, 410 (2016). [Impact Factor 1.354] [Cited by: 1] *Also corresponding Author
  • Studies on the Synthesis and Physico-Chemical Properties of Porous LiFe0.9M0.1P2O7 (M = Fe, Co, Mn, Ni) Nanoparticles Y. Sudha, K. V. Shankar, S. Layek, C. Sanjeeviraja and R. K. Selvan J. Nanosci. Nanotech., 16, 342 (2016). [Impact Factor 1.354] [Cited by: 3]
  • Room temperature ferromagnetism in Mn-doped NiO nanoparticles S. Layek* and H. C. Verma J. Mag. Mag. Mat., 397, 73 (2016). [Impact Factor 3.06] [Cited by: 39] *Also corresponding Author
  • Electrical and magnetic properties of spherical SmFeO3 synthesized by aspartic acid assisted combustion method S. Yuvaraj, S. Layek, S. M. Vidyavathy, S. Yuvaraj, D. Meyrick, R. K. Selvan Mat. Res. Bull., 72, 77 (2015). [Impact Factor 2.873] [Cited by: 32]
  • Enhancement in magnetic properties of Ba-doped BiFeO3 ceramics by mechanical activation
    S. Layek*, H. C. Verma and A. Garg J. Ally. Comp., 691, 294 (2015). [Impact Factor 3.779] [Cited by: 23] *Also corresponding Author
  • Room temperature ferromagnetism in undoped and Mn doped CdO nanostructures S. Kumar, S. Layek, M. Yashpal and A. K. Ojha J. Mag. Mag. Mat., 393, 555 (2015). [Impact Factor 3.06] [Cited by: 20]
  • Implication of Mössbauer spectra on the mixing model of eucrites and diogenites (resulting in howardites)
    B. Bhatia, K. R. Patel, R. P. Tripathi, S. Layek and H. C. Verma Current Science, 109, 331 (2015). [Impact Factor 0.883] [Cited by: 5]
  • Influence of pH and fuels on the combustion synthesis, structural, morphological, electrical and magnetic properties of CoFe2O4 nanoparticles Shanmugavani, R. K. Selvan, S. Layek, L. Vasylechko, C. Sanjeeviraja Mat. Res. Bull., 71, 122 (2015). [Impact Factor 2.873] [Cited by: 17]
  • Effect of annealing on the magnetic properties of ball milled NiO powders B. Kisan, P. Saravanan, S. Layek, H. C. Verma, D. Hesp, V. Dhanak, S. Krishnamurthy, A. Perumal J. Mag. Mag. Mat., 384, 296 (2015). [Impact Factor 3.06] [Cited by: 14]
  • Corrosion Behavior of  High-Strength Bainitic Rail Steels A. P. Moon, S. Sangal, S. Layek, S. Giribaskar and K. Mondal Metallurgical and Materials Transactions A, 46, 1500 (2015).  [Impact Factor 1.887][Cited by: 15]
  • Controlled synthesis and magnetic properties of monodispersed ceria nanoparticles S. Kumar, M. Srivastava, J. Singh, S. Layek, M. Yashpal, A. Materny and A. K. Ojha AIP Advances, 5, 027109 (2015). [Impact Factor 1.568] [Cited by: 36]
  • Finite size effects in magnetic and optical properties of antiferromagnetic NiO nanoparticles Kishan, P. C. Shyni, S. Layek, H. C. Verma, D. Hesp, V. Dhanak, S. Krishnamurthy and A. Perumal IEEE Trans. Magn., 50, 032140 (2014). [Impact Factor 1.213] [Cited by: 20]
  • Size dependent electrical and magnetic properties of ZnFe2O4 Nanoparticles synthesized by Combustion Method: Comparison between Aspartic acid and Glycine as Fuels Shanmugavani, R. K. Selvan, S. Layek and C. Sanjeeviraja J. Mag. Mag. Mat., 354, 363 (2014). [Impact Factor 3.06] [Cited by: 43]
  • Role of surface functionalization in ZnO:Fe nanostructures R. N. Lokesh, L. Balakrishnan, K. Jeganathan, S. Layek, H. C. Verma and N. Gopalakrishnan Mat. Sci. Eng. B, 183, 39 (2014). [Impact Factor 3.316] [Cited by: 13]
  • Synthesis, magnetic and Mössbauer spectroscopic studies of Cr doped lithium ferrite nanoparticles M. Srivastava, S. Layek, J. Singh, A. K. Das, H. C. Verma, A. K. Ojha, N. H. Kim and J. H. Lee J. Alloy. Comp., 591, 174 (2014). [Impact Factor 3.779] [Cited by: 38]
  • The influence of precursors on phase evolution of nano iron oxides/oxyhydroxides: optical and magnetic properties K. Rout, M. Mohapatra, S. Layek, A. Dash, H. C. Verma and S. Anand New J. Chem., 38, 3492 (2014). [Impact Factor 3.277] [Cited by: 19]
  • Preparation and studies on (1-x) BiFeO3–x Li0.5Fe2.5O4 (x=0.25 and 0.5) multiferroic nano-composites S. Layek*, S. K. Bag and H. C. Verma Adv. Mat. Lett., 4, 26 (2013). [Cited by: 2]*Also corresponding Author
  • Structural and magnetic properties of Mg-doped nano-α-Fe2O3 particles synthesized by surfactant mediation–precipitation technique M. Mohapatra, S. Layek, S. Anand, H. C. Verma and B. K. Mishra Phys. Sta.  Sol. B, 250, 65 (2013). [Impact Factor 1.729] [Cited by: 16]
  • Mössbauer and Magnetic Studies of Surfactant Mediated Ca-Mg Doped Ferrihydrite Nanoparticles S. Layek*, M. Mohapatra, S. Anand and H. C. Verma J. Nanosci. Nanotech., 13, 1834 (2013). [Impact Factor 1.354] [Cited by: 6]*Also corresponding Author
  • Magnetism of Fe in SrFe2As2: Local investigation by time differential perturbed angular distribution (TDPAD) spectroscopy S. K. Mohanta, S. N. Mishra, S. M. Davane, N. Kumar, A. Thamizhavel, S. Layek, Z. Hossain and S. K. Srivastava Hyper. Int., 221, 23 (2013). [Impact Factor 0.65] [Cited by: 2]
  • Room temperature ferromagnetism in Fe-doped CuO nanoparticles S. Layek* and H. C. Verma J. Nanosci. Nanotech., 13, 1848 (2013). [Impact Factor 1.354] [Cited by: 14]*Also corresponding Author
  • Local probe studies of Fe hyperfine field in CaFe2As2 by time differential perturbed angular distribution (TDPAD) spectroscopy and ab-initio methods S. K. Mohanta, S. N. Mishra, S. M. Davane, N. Kumar, A. Thamizhavel, S. Layek, Z. Hossain and S. K. Srivastava Nuc. Instr. Methd. Phys. Res., B, 299, 71 (2013). [Impact Factor 1.323] [Cited by: 3]
  • Preparation, structural and magnetic studies on BiFe1-xCrxO3 (x=0.0, 0.05 and 0.1) multiferroic nanoparticles S. Layek*, S. Saha and H. C. Verma AIP Advance, 3, 032140 (2013). [Impact Factor 1.568] [Cited by: 35]*Also corresponding Author
  • Local magnetic behaviour of 54Fe in EuFe2As2 and Eu0.5K0.5Fe2As2: Microscopic study using time differential perturbed angular distribution (TDPAC) spectroscopy S. K. Mohanta, S. N. Mishra, S. M. Davane, S. Layek and Z. Hossain Modern Physics Letters B, 27, 1350234 (2013). [Impact Factor 0.687] [Cited by: 1]
  • Influence of Ca Ions on Surfactant Directed Nucleation and Growth of Nano Structured Iron Oxides and Their Magnetic Properties M. Mohapatra, D. Behera, S. Layek, S. Anand, H. C. Verma and B. K. Mishra Crys. Grow. Des., 12, 18 (2012). [Impact Factor 3.972] [Cited by: 12]
  • Magnetic and dielectric properties of multiferroic BiFeO3 nanoparticles synthesized by a novel citrate combustion method S. Layek* and H. C. Verma Adv. Mat. Lett., 3, 533 (2012). [Cited by: 85]*Also corresponding Author
  • Protonation of an Oxo-Bridged Diiron Unit Gives Two Different Iron Centers: Synthesis and Structure of a New Class of Diiron(III)-μ-hydroxo Bisporphyrins and the Control of Spin States by Using Counterions S. Bhowmik, S. K. Ghosh, S. Layek, H. C. Verma and S. P. Rath Chem. Europ. Jour., 18, 13025 (2012). [Impact Factor 5.16] [Cited by: 46]
  • Fluoride adsorption studies on mixed-phase nano iron oxides prepared by surfactant mediation-precipitation technique M. Mohapatra, K. Rout, P. Singh, S. Anand, S. Layek, H. C. Verma and B. K. MishraJ. Hazar. Mat., 186, 1751 (2011). [Impact Factor 6.434] [Cited by: 52]
  • Synthesis of γ–Fe2O3 nanoparticles with crystallographic and magnetic texture S. Layek, A. Pandey, A. Pandey and H. C. Verma Int. J. of Eng. Sci. and Tech., 2, 33 (2010). [Impact Factor 0.38] [Cited by: 81]
  • Cation distribution of Ni0.5Zn0.5Fe2O4 nanoparticles R. K. Singh, C. Upadhyay, S. Layek and A. Yadav, Int. J. of Eng. Sci. and Tech., 2, 104 (2010). [Impact Factor 0.38] [Cited by: 8]
  • Magnetic structure of Fe-Fe oxide nanoparticles made by electrodeposition S. Kumar, S. Layek, B. Pandey and H. C. Verma Int. J. of Eng. Sci. and Tech., 2, 66 (2010). [Impact Factor 0.38] [Cited by: 9]
  • Nuclearity Control in Molecular Iron Phosphates through Choice of Iron Precursors and Ancillary Ligands R. Murugavel, N. Gogoi, K. G. Suresh, S. Layek and H. C. Verma Chem. Asian Jour., 4, 923 (2009). [Impact Factor 4.08] [Cited by: 20]
  • Valence fluctuation in Ce2Co3Ge5 and crystal field effect in Pr2Co3Ge5 S. Layek, V. K. Anand and Z. Hossain J. Mag. Mag. Mat. 321, 3447 (2009). [Impact Factor 3.06] [Cited by: 26]
  • Effect of iron doping concentration on magnetic properties of ZnO nanoparticles P. K. Sharma, R. K. Dutta, A. C. Pandey, S. Layek and H. C. Verma J. Mag. Mag. Mat., 321, 2587 (2009). [Impact Factor 3.06] [Cited by: 117]

Peer-reviewed Conference Proceedings:

  • High pressure structural and electronic transition in lithium ferrites S. Layek, E. Greenberg, W. Xu, D. Levy, J. -P. Itié, M. P. Pasternak, G. Kh. Rozenberg Acta Cryst. 70, C1432 (2017)
  • Preparation and Magnetic Studies on 10% Co-doped BiFeO3 Multiferroic Nanoparticles S. Layek, S. Das and H.C. Verma AIP Conf. Proc. 1349, 351 (2011). [Cited by: 2]
  • Local Magnetic Behavior of 54Fe In SrFe2As2: Microscopic Study by Perturbed Angular Distribution Spectroscopy S. K. Mohanta, S. Layek, Z. Hossain, S. K. Srivastava and S. N. Mishra AIP Conf. Proc. 1349, 889 (2011).
  • Local Magnetic Behavior of 54Fe In EuFe2As2: Microscopic Study by Perturbed Angular Distribution Spectroscopy S. K. Mohanta, S. Layek, Z. Hossain, S. K. Srivastava, and S. N. Mishra AIP Conf. Proc. 1313, 109 (2010).

Conference Presentations:

Oral Presentation:

  • 24th Congress & General Assembly of the International Union of Crystallography 2017 at Hyderabad, India
    Title: "High pressure structural and electronic transitions in lithium ferrites"
  • 54th EHPRG International meeting on High Pressure Science and Technology, Bayreuth, Germany
    Title: "Transport properties of GeSb2Te4 at elevated pressure"
  • Joint AIRAPT-25th & EHPRG-53rd International Conference on High Pressure Science and Technology in Madrid, Spain
    Title: "Mott transition in ordered LiFe5O8 spinel ferrite"
  • International Conference on Nanomaterials and Nanotechnology, ICNANO-2011, University of Delhi, India
    Title: “Effect of A and B site substitution on the structural, magnetic and electrical properties of BiFeO3 multiferroics nanoparticles”

Poster Presentation:

  • S. Layek and H. C. Verma “Effect of mechanical alloying on the structural and magnetic properties of Bi1-xYxFeO3 (x=0.0, 0.1 and 0.2) multiferroic ceramics” Spring Meeting on European Material Research Society, EMRS-2012, Warsaw, Poland.
  • S. Layek and H. C. Verma  “Structural and magnetic studies on Fe-doped NiO nanoparticles synthesized by combustion method” Spring Meeting on European Material Research Society, EMRS-2012, Warsaw, Poland.
  • S. Layek and H. C. Verma “Magnetic and dielectric properties of multiferroic BiFeO3 nanoparticles synthesized by a novel citrate combustion method” International Conference on Nanomaterials and Nanotechnology, ICNANO-2011, University of Delhi, India
  • S. Layek and H. C. Verma “Effect of Ca2+ substitution on the structural and magnetic properties of BiFeO3 multiferroics” International Conference on Magnetic Materials (ICMM-2010) SINP, Kolkata, India
  • S. Layek and H. C. Verma “Structural, magnetic and electrical properties of doped BiFeO3 multiferroics” International Conference on Interaction, Instability, Transport and Kinetics: Glassiness and Jamming, IIT Kanpur, India
  • S. Layek and H. C. Verma “Effect of Ba and Nd doping on the structural, magnetic and electrical properties of BiFeO3 multiferroics nanoparticles” Condensed Matter Physics Workshop, IIT Kanpur, India
  • S. Layek and H. C. Verma “Synthesis of γ–Fe2O3 nanoparticles with crystallographic and magnetic texture” Condensed Matter Physics Workshop, IIT Kanpur, India

Honours and Achievements:

  • Certificate for outstanding contribution in reviewing from Materials Letters, Elsevier in 2017
  • IUCR Young Scientist Award to participate IUCR 2017 conference at Hyderabad, India in 2017
  • PBC Post-Doctoral Fellowship for 3 years by Council for Higher Education, Israel from 2013-2016
  • Selected among the top 1% students in the IAPT (Indian Association of Physics Teachers) exam in 2005

Personal interests: Photography, Badminton, Cricket, etc.