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Neeraj Mehta

Assistant Professor
Department of physics
Banaras Hindu University


Current Research Projects: S. No. Name of the Project Duration Source of Funding Amount of Funding (Rs) 1. Investigation of Laser Induced Crystallization in Thin Films of Some Selenium based Glassy Alloys 2010-2013 CSIR, New Delhi Rs. 11.5 Lacs 2. Effect of Silver Incorporation on Electrical and Photoelectrical Properties of Some Se-Te and Se-Ge based Glassy Alloys 2011-2014 UGC Rs. 9.98 Lacs 3. Study of Laser Induced Effects on Glass transition & Crystallization Kinetics in Selenium based Glassy Alloys 2011-2014 BRNS Rs. 16.85 Lacs 4. Study of dielectric relaxation in some selenium based non-oxide glasses 2012-2015 DST Rs. 27.54 Lacs Any additional information: Life member of Indian Association of Physics Teachers (IAPT) Life member of International Forum of Chalcogeniders Referee of reputed International Journals (Material Letters & Physica B, Publishers: Elsevier, Netherlands; Physica Scripta, Publishers: Institute of Physics Publishing, USA) Academic Qualifications: S. No. Degree Institution Year 1. B.Sc. C.S.J.M. University, Kanpur, U.P., India 1998 2. M.Sc. C.S.J.M. University, Kanpur, U.P., India 2000 3. Ph. D. Uttar Pradesh Technical University, Lucknow, U.P., India 2007

Research Interest

Chalcogenide glasses are well known as optical materials for their applications in phase-change optical recording technique and infrared fibre optics. A lot of research work has been done on chalcogenide glasses; however the basic physics of these materials have not reached to a level, which is required to develop devices at par with crystalline semiconductor devices. Even after many extensive works, many important problems are still unanswered e.g. the exact nature of energy distribution of different defect states, the role of impurities, the exact recombination process, contact effect, thermal relaxation effect and dielectric relaxation. These days, I am engaged in studying dielectric-relaxation studies in chalcogenide glasses, crystallization kinetics / glass transition kinetics of chalcogenide glass under various conditions for both application and technological purposes. The following work has been done on different glassy systems in last three years:


  • Further MN rule for thermally activated high field conduction in bulk samples of glassy Se100-xSbx alloys V. S. Kushwaha, N. Mehta & A. Kumar Vacuum 83 (2009) 1169�1173.

  • Further Meyer-Neldel rule in thermally activated crystallization of chalcogenide glasses N. Mehta & A. Kumar Journal of Non-crystalline Solids, 354 (2008) 5347-5352.

  • Compensation effect in thermally activated photoconduction in amorphous thin films of Se75In25-xPbx alloys N. Mehta, D. Kumar & A. Kumar Philosophical Magazine, 88 (2008) 61-70.

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