Varma Ghanshyam Das - Department of Physics,Indian Institute of Technology Roorkee
Varma Ghanshyam Das
G.D. Verma Head of department g.varma@ph.iitr.ac.in 91-01332-285353
Areas of Interest
  • Experimental Condensed Matter Physics, Superconductivity, Magnetism, Gas sensing, Supercapacitors and nanomaterials., Superconductivity, Magnetotransport properties of MgB2 and Fe-chalcogenide superconductors. , Magnetism and Magnetic materials, Magnetic and magnetotransport properties of perovskite manganites and spinel ferrite/cobaltite., Gas sensing and Electrochemical Properties, 2 D materials (rGO/MoS2) -metal oxides nanocomposites.
Educational Details
DegreeSubjectUniversityYear
B.Sc. (Hons)Physics (Hons), Chemistry, MathsBanaras Hindu University, Varanasi1982
M.Sc.PhysicsBanaras Hindu University, Varanasi1985
Ph.D.PhysicsBanaras Hindu University, Varanasi1994
Sponsored Research Projects
TopicFunding AgencyStart DatePeriod
Investigations of Hg-based cuprate and MgB2 superconductorsCSIR2008-0112 years 7 months
Synthesis and characterization of ordered nanostructures (wires) of ZnO using anodized porous aluminBRNS2012-018 years 7 months
Growth and investigation of a new non-cuprate high temperature superconductorDST Indo-Swiss joint project2012-018 years 7 months
Growth and investigation of Fe-chalcogenide and alkali doped Fe-selenide superconductors. CSIR2015-015 years 7 months
Investigation of Fe-based chalcogenide superconductorsSERB2016-014 years 7 months
Memberships
  • INDIAN PHYSICS ASSOCIATION, Member
Teaching Engagements
TitleCourse CodeClass NameSemester
Semiconductor Device physicsPHN-709M.TechAutumn
Analog ElectronicsPHN-102B.Tech(EPH)Spring
Semiconductor Devices and ApplicationsPHN-513M.sc (Physics)Autumn
Semiconductor microelectronics TechnologyPHN-724M.TechSpring
Research Scholar Groups
Scholar NameInterest
Dharmendra S. RaghavMagnetism and Magnetic Materials
Neha KanaujiaEnergy Storage Devices, Supercapacitors
ATUL KUMARGas and Humidity Sensors and Devices fabrication for VOCs
Himanshu ChauhanFe-Chalcogenides Superconductors, Topological Insulators
Anshika VermaRadar absorbing Materials
Prem Sagar ShuklaEnergy Storage Devices, Supercapacitors
Shivam Kumar MiglaniNano-magnetism and Magnetic Materials
PHDs Supervised
TopicScholar NameStatus of PHDRegistration Date
Low field magnetoresistive behavior of La1-xAxMnO3 (A= Sr, Ca) and Sr2FeMoO6 perovskitesANURAG GAURO2020-08
Synthesis and characterization of oxide based diluted magnetic semiconductorsVIJAY KUMAR SHARMAO2020-08
Study of doping effect on structural and superconducting properties of MgB2 superconductorNIGAMANANDA OJHAO2020-08
Study of A, B-site doped charge ordered Bi1-xCaxMnO3 and (Nd/La)0.5Sr0.5MnO3 perovskitesKAMLESH YADAVO2020-08
Fabrication and study of ZnO nanowires, rGO and rGO-ZnO nanocomposite based gas sensorsNAGESH KUMARO2020-08
Study of superconducting properties of MgB2 and Fe-chalcogenide superconductorsSUDESHO2020-08
Structural, optical and magnetic properties of spinel oxide nanoparticlesSTUTI RANIO2020-08
Synthesis of pure and doped CuO nanostructures and their multifunctional propertiesUMESH KUMAR GAURO2020-08
Investigations on synthesis, structural and superconducting properties of Fe(Te,Se) superconductorsROHIT KUMARO2020-08
Synthesis and Characterization of CuO-rGO based nanocomposites for NO2 sensorsJYOTIO2020-08
Synthesis and characterization of nanocrystalline perovskite manganitesDHARMENDRA SINGH RAGHAVO2015-01
Growth and characterization of 2-D materials based nanocompositesNEHA KANAUJIAO2015-01
Synthesis of graphene based nanocomposites, their characterization and gas sensing behaviourATUL KUMARO2016-01
Synthesis and characterization of Fe- Chalcogenide and Bi- based topological InsulatorsHIMANSHU CHAUHANO2017-01
Growth and characterization of 2D materials nanocomposites and its application in super-capacitor PREM SAGAR SHUKLAO2018-01
Development of broadband microwave absorbing materialsANSHIKA VERMAO2018-01
Nano-magnetism and Magnetic MaterialsSHIVAM KUMAR MIGLANIO2019-01
Visits to outside institutions
Institute VisitedPurpose of VisitDate
UNIVERSITY OF FRIBOURG, SWITZERLAND UNDER INDO-SWISS JOINT PROJECT2020-08-31
DEPARTMENT OF PHYSICS, UNIVERSITY OF NORTH DAKOTADELIVERED A LECTURE AND DISCUSSIONS2020-08-31
R.R.C.A.T. INDOREResearch purpose2020-08-31
C.S.I.R. NATIONAL PHYSICAL LABORATORY, NEW DELHI.Research purpose2020-08-31
Refereed Journal Papers

Last five years

 

  1. Jyoti and G. D. Varma. "Morphology-dependent room temperature NO2 detection of CuO nanostructure/rGO composites." Applied Physics A 126.2 (2020): 143.
  2. R. Kumar and G. D. Varma. "Study of TAFF and vortex phase of FexTe 0.60 Se 0.40 (0.970≤ x≤ 1.030) single crystals." Physica Scripta (2020).
  3. D. S. Raghav, S. Kumari, H. K. Singh and G. D. Varma, “Structure, magnetism and electrical transport of sol-gel derived La0.30Pr0.30Ca0.40MnO3: Elucidating consequences of size effect”, J. Magnetism and Magnetic Materials 497 (2020) 166003.
  4. Jyoti and G. D. Varma, “Enhanced room temperature sensitivity of Ag-CuO nanobrick/reduced graphene oxide composite for NO2” J. Alloys and Compounds 806 (2019) 1469.
  5. R. Kumar and G. D. Varma, Effect of Co Doping on the Superconducting Properties of Polycrystalline Fe1.01-xCoxTe0.52Se0.48, Journal of Superconductivity and Novel Magnetism 32 (2019)3715. 
  6. Kumari, Suman, Shital Chauhan, D. S. Raghav, P. K. Siwach, G. D. Varma, and H. K. Singh. "Suppression of Spin Glass Behavior in Phase Separated La0.22 Pr0.40Ca0.38MnO3 by Nanostructuring." IEEE Transactions on Magnetics 55, no.12 (2019): 1-7.
  7. R. Kumar, A. Mitra and G. D. Varma, Study of vortex glass-liquid transition in superconducting Fe(Te,Se) thin films on LaAlO3 substrates, Journal of Applied Physics 125(2019) 193902.
  8. Jyoti and G. D. Varma, Synthesis of CuO-ZnO/rGO ternary composites for superior NO2 gas sensor at room temperature, Materials Research Express 3 (2019) 035011. 
  9. N. Kanaujiya, N. Kumar, Y. Sharma and G. D. Varma, Probing the Electrochemical Properties of Flower Like Mesoporous MoS2 in Different Aqueous Electrolytes, Journal of Electronic Materials 48 (2019) 904. 
  10. Neha Kanaujiya, Nagesh Kumar, A.K. Srivastava, Yogesh Sharma, G.D. Varma, One-step synthesized mesoporous MnO2@MoS2 nanocomposite for high Performance energy storage devices, Journal of Electroanalytical Chemistry 824 (2018)226. 
  11. Jyoti, A. K. Srivastava and G. D. Varma, “Highly selective and efficient room temperature NO2 gas sensors based on Zn-doped CuO nanostructure-rGO hybrid”, J. Mater. Sci: Materials in Electronics 29 (2018) 10640. 
  12. R. Kumar, Sudesh and G. D. Varma,“Superconducting, magnetic and magnetotransport properties of FeTe1-xSex single crystals”, AIP Advances 8 (2018) 055819. 
  13. K. Yadav, H. K. Singh, K. K. Maurya and G. D. Varma,“Thickness-dependent magnetic and transport properties of La0.5Sr0.5MnO3 thin films deposited by DC magnetron sputtering on the LaAlO3 substrate”, Applied Physics A: Materials Science and Processing 124 (2018) 66. 
  14.  K. Yadav, M. P. Singh, F. S. Razavi and G. D. Varma, “Effect of Ti4+ doping on Magnetic properties of charge ordered Bi0.3Ca0.7MnO3”, Materials Research Express 4 (2017) 076102.
  15. Puthucheri Smitha, Isha Singh, Mohd Najim, Ravi Panwar, Dharmendra Singh, Vijaya Agarwala and G. D. Varma, “Development of thin broad band radar absorbing materials using nanostructured spinel ferrites”, J Mater Sci: Mater Electron 27 (2016)7731.
  16. Stuti Rani, Yogesh Sharma and G. D. Varma, “Structurally induced spin canting and metamagnetism in CoFe2Onanoparticles synthesized via co-precipitation method”, J. Superconductivity and Novel Magnetism 28 (2015) 3633.
  17. N. Mishra, N. Dabra, A. Nautiyal, J. S. Hundal, G. D. Varma, N. P. Pathak and R. Nath, “Ferroelectric and Switching Properties of Spray Deposited NaNO2: PVA Composite Films on Porous Silicon” Ferroelectric Letter Section 42 (2015)75.
  18. Stuti Rani and G. D. Varma, “Superparamagnetism and metamagnetic transition in Fe3O4 nanoparticles synthesized via co-precipitation method at different pH”, Physica B 472(2015)66.
  19. N. Kumar, B. K. Gupta, A. K. Srivastava, H. S. Patel, P. Kumar, I. Banerjee, T. N. Narayanan and G. D. Varma, “Multifunctional Two-Dimensional Reduced Graphene Oxide Thin Film for Gas Sensing and Antibacterial Applications”, SCIENCE OF ADVANCED MATERIALS 7(2015)1125.
  20. Sudesh, S. Das, C. Bernhard and G. D. Varma, “Effect of combined addition of Graphene oxide and citric acid on superconducting properties of MgB2”, Physica C 509(2015) 49.
  21. Umesh Kumar Gaur, Anil Kumar and G. D. Varma, “Fe-induced morphological transformation of 1-D CuO nanochains to porous nanofibers with enhanced optical, magnetic and ferroelectric properties”, JOURNAL OF MATERIALS CHEMISTRY C 3(2015)4297. 
  22. N. Kumar, A. K. Srivastava, R. Nath, B. K. Gupta, G. D. Varma, “Probing the highly efficient room temperature ammonia gas sensing properties of a luminescent ZnO nanowire array prepared via an AAO-assisted template route”, DALTON TRANSACTIONS 43(2014)5713.
  23. Sudesh, S. Das, C. Bernhard and G. D. Varma, “Enhanced superconducting properties of rare-earth oxides and graphene oxide added MgB2” Physica C 505 (2014) 32.
  24. Sudesh, S. Das, C. Bernhard, T. Shripathi and G. D. Varma, “Study of Superconducting Properties of ferrocene-added MgB2, Phys. Status Solidi A 211(2014) 1503. 
  25. Umesh Kumar Gaur, Anil Kumar and G. D. Varma, “The synthesis of self- Assembled Polycrystalline 1-D CuO nanostructures in aqueous medium and a study of their multifunctional features, CrystEngComm 16(2014)3005.
  26. Nagesh Kumar, A. K. Srivastava, R. Nath, Bipin Kumar Gupta and G. D. Varma, “Probing the highly efficient room temperature ammonia gas sensing properties of a luminescent ZnO nanowire array prepared via an AAO-assisted template route”, Dalton Transactions 43(2014)5713.
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