Personal Information

Dr. Sandeep Kumar

Assistant Professor (UGC)
Department of Physics

M. Sc. (IIT Roorkee), JRF-NET (CSIR), Ph. D. (JNU/IUAC New Delhi).

sandeep.kumar@curaj.ac.in
  • Electrical and magnetic properties of nanostructures, Spin transport and Nanospintronics, Semiconductor nanowires, Modification of materials using energetic ions.

Professional Experience

  • April, 2014 to Till date: UGC-Assistant Professor, Central University of Rajasthan, India
  • Dec, 2009 to Dec 2013: Researcher, Department of Physics, Lund University, Lund, Sweden
  • Dec, 2008 to Dec, 2009: Postdoctoral Fellow, Laboratorio Nazionale TASC-INFM, Trieste, Italy.

 

Education

Ph.D (Physics)

Thesis title: Ion beam modification of metal-silicon junctions

Thesis Supervisor: Dr. D. Kanjilal

University: Jawaharlal Nehru University, New Delhi, India/ Inter-University Accelerator Centre (IUAC), New Delhi, India 

M. Sc. (Physics)

 Indian Institute of Technology (I.I.T.) Roorkee, Roorkee, India.

Publication List 

  1. Coexistence of space charge limited and variable range hopping conduction mechanism in sputter-deposited Au/SiC metal-semiconductor-metal device Alisha, S. Mourya, N. Singh, Sandeep Kumar, R. Chandra and V. K. Malik IEEE Transactions on Electron Devices, 70, 714 (2023).
  2. Fabrication of energy storage EDLC device based on self-synthesized TiO2 nanowire dispersed polymer nanocomposite films, C. Devi, R. Swaroop, A. Arya, S. Tanwar, A.L. Sharma, Sandeep Kumar Polymer Bulletin 79, 4701-4719 (2022).
  3. Optical and Low-Temperature Magnetocaloric Properties of HoCr0.5Mn0.5O3 Compound  K. Kanwar, M Vasundhara, Sandeep Kumar, P. Kumar, S.D. Kaushik, N.Panwar Journal of Superconductivity and Novel Magnetism 35, 625 (2022).
  4. High sodium ion conductivity in PEO/PVP solid polymer electrolytes with InAs nanofillers C. Devi, J. Gellanki, H. Pattersson, Sandeep Kumar Scientific Reports 11, 20180 (2021).
  5. A comparative study of the structural, optical, magnetic and magnetocaloric properties of HoCrO3 and HoCr0. 85Mn0. 15O3 orthochromites K. Kanwar, I.Coondoo, M Anas, V. K. Malik, P. Kumar, Sandeep Kumar, P. K. Kulriya, S.D. Kaushik, N. Panwar Ceramics International 73, 4186(2021).
  6. Electrical transport properties of InAs nanowires synthesized by a solvothermal method C. Devi, R. Singhal, K. Silva, W. Paschoal Jr., H. Pettersson, Sandeep Kumar Nanotechnology 31, 235709(2020).
  7. Evaluation of carrier density and mobility in Mn ion-implanted GaAs:Zn nanowires by Raman spectroscopy Sandeep Kumar, G. B. Corrêa Jr.,  C. Devi, D. Madsen, A. Johannes, C. Ronning, W. Paraguassu, W. Paschoal Jr. and H. Pettersson Nanotechnology  31, 205705 (2020).
  8. In-situ study of electrical transport in Pd/n-Si under high energy ion irradiation H. K. Chourasiya, P. K. Kulriya, N. Panwar, Sandeep Kumar Semicond. Sci. Technol. 35, 085004 (2020).
  9. Influence of barrier inhomogeneities on transport properties of Pt/MoS2 Schottky barrier junction Neetika, Sandeep Kumar, A. Sanger, H. K. Chourasiya, A. Kumar, K. Asokan, R. Chandra, V. K. Malik J. Alloys and Compounds 797, 582 (2019).
  10. Raman characterization of single-crystalline Ga0.96Mn0.04As:Zn nanowires realized by ion-implantation G. B. Corrêa Jr., Sandeep Kumar, W. Paschoal Jr., C. Devi, D. Jacobsson, A. Johannes, C. Ronning, H. Pettersson and W. Paraguassu Nanotechnology 30, 335202 (2019). *
  11. Structural, Electrical, Optical and Magnetic Properties of SmCrO3 chromites: Influence of Gd and Mn co-doping N. Panwar, I. Coondoo, S. Kumar, Sandeep Kumar, M. Vasundhara, A. Rao J. Alloys and Compounds 792, 1122 (2019).
  12. Analysis of the carrier conduction mechanism in 100 MeV O7+ ion irradiated Ti/n-Si Schottky barrier structures H. K. Chourasiya, P. K. Kulriya, N. Panwar, Sandeep Kumar Nucl. Instr. And Meth. B 443, 43 (2019).
  13. Lithium doping and photoluminescence properties of ZnO nanorods N. Shakti, C. Devi, A. K. Patra, P. S. Gupta, and Sandeep Kumar AIP Advances 8, 015306 (2018).
  14. Structural, Magnetic, Magnetocaloric and Specific heat Investigations on Mn doped PrCrO3 Orthochromites S. Kumar, I. Coondoo, Vasundhara M, Sandeep Kumar; A. Kholkin, N. Panwar J. Phys. C: Cond. Matter. 29, 195802 (2017).
  15. Synthesis of CdS and CuS Nanoparticles for Photovoltaic Devices A. Gurnani, H. Inani, Y. S. Katharria, Sandeep Kumar,  Bionano Frontier 8, 144 (2015).
  16. Magnetoresistance in Mn ion-implanted GaAs:Zn nanowires W. P. Jr, Sandeep Kumar, D. Jacobsson, A. Johannes, V. Jain, C. M. Canali, A. Pertsova, C. Ronning, K. A. Dick, L. Samuelson, H. Pettersson Appl. Phys. Lett. 104, 153112 (2014).*
  17. Enhanced sputtering and incorporation of Mn in implanted GaAs and ZnO nanowires
    A. Johannes, S. Noack, W. Paschoal, Sandeep Kumar, D. Jacobsson, K. Dick, H. Pettersson, L. Samuelson, G. Martines-Criado, M. Burghammer, C. Ronning J. Phys. D: Appl. Phys. 47, 394003 (2014).
  18. Magnetic polarons and large negativee magnetoresistance in GaAs nanowires implanted with Mn ions Sandeep Kumar W. P. Jr, A. Johannes, D. Jacobsson, C. Borschel, A. Pertsova, C-H, Wang, M. K. Wu, C. M. Canali, C. Ronning, L. Samuelson and H. Pettersson NanoLetters 13, 5079 (2013).
  19. Hopping conduction in Mn ion implanted GaAs nanowires W. P. Jr, Sandeep Kumar, C. Borschel, P. Wu, C. M. Canali, C. Ronning, L. Samuelson and H. Pettersson, NanoLetters 12, 4838 (2012). *
  20. Thermoelectric Characterization of Electronic Properties of GaMnAs Nanowires P. Wu, W. P. Jr, Sandeep Kumar, C. Borschel,  C. M. Canali, C. Ronning, L. Samuelson, H. Pettersson and H. Linke  J. Nanotechnol. 2012, 480813(2012).
  21. A new route towards semiconductor nanospintronics: highly Mn-doped GaAs nanowires realized by ion-implantation under dynamic annealing conditions C. Borschel, M. E. Messing, M. T. Borgström, W. Paschoal Jr, J. Wallentin, Sandeep Kumar, K. Mergenthaler, K. Deppert, C. M. Canali, H. Pettersson, L. Samuelson and C. Ronning  NanoLetters 11, 3935 (2011).
  22. Synthesis of Controlled Diluted Magnetic Semiconductor by Ni Implantation in ZnO Crystal D. K. Mishra, P. Kumar, Sandeep Kumar, S. Mohapatra, I. Sulania, A. Tripathi, S. Varma, M. K. Sharma, R. Chatterjee and D. Kanjilal  Adv. Sci. Lett. 2, 324 (2009).
  23. Effects of thermal and athermal processing on the formation of buried SiC layers Y. S. Katharria, Sandeep Kumar, D. Kanjilal, D. Chauhan, J. Ghatak, U. Bhatta and P. V. Satyam J. Appl. Phys. 105, 014301 (2009).
  24. Ion beam pattering of nano-grating on SiC surface Y. S. Katharria, Sandeep Kumar, A. T. Sharma and D. Kanjilal, Surf. Coat. Tech. 203, 2442 (2009).
  25. Effect of ion irradiation on current-voltage characteristics of Au/n-GaN Schottky diodes V. Baranwal, Sandeep Kumar, A. C. Pandey and D. Kanjilal J. Alloys and Compounds 480, 962 (2009).
  26. In-situ current-voltage analysis of Au/GaAs Schottky diode under nitrogen ion irradiation  A.T. Sharma, Shahnawaz, Sandeep Kumar, Y. S. Katharria, P. Kumar and D. Kanjilal Surf. Coat. Tech. 203, 2667 (2009).
  27. Ion-beam-induced modification in GeOx thin films: A phase sepration study Y. Batra, D. Kabiraj, Sandeep Kumar and D. Kanjilal, Surf. Coat. Tech. 203, 2415 (2009).
  28. Swift heavy ion irradiation induced defects and electrical characteristics of Au/n-Si Schottky structure Sandeep Kumar, Y. S. Katharria and D. Kanjilal, J. Phys D: Appl. Phys. 41, 105105 (2008).
  29.  Setup for in situ deep level transient spectroscopy of semiconductors during swift heavy ion irradiation Sandeep Kumar, Sugam Kumar, Y. S. Katharria, C. P. Safvan and D. Kanjilal Rev. of Sci. Instrum. 79, 056103 (2008).
  30.  Influence of 100 MeV oxygen ion irradiation on Ni/Si (100) Schottky barrier characteristics Sandeep Kumar, Y. S. Katharria and D. Kanjilal, J. Appl. Phys. 103, 044504 (2008).
  31. Inhomogeneities in 130 MeV Au ion irradiated Au/n-Si structure Sandeep Kumar, Y.S. Katharria, Y. Batra and D. Kanjilal, Appl. Surf. Sci. 254, 3277 (2008).
  32. Pulsed laser deposition of SiC thin films at medium substrate temperatures  Y. S. Katharria, Sandeep Kumar, R. Prakash, R.J. Choudhary, F. Singh, N. P. Lalla, D. M. Phase, D. Kanjilal, Thin Solid Films 516, 6083 (2008).
  33. Point defect creation by low fluence swift heavy ion irradiation-induced low energy electrons in YBa2Cu3O7-y R. Biswal, J. John, D. Behera, P. Mallick, Sandeep Kumar, D. Kanjilal, T. Mohanty, P. Raychaudhuri and N. C. Mishra, Supercond. Sci. Technol. 21, 085016 (2008).
  34. Elastic Recoil Detection (ERD) Analysis of GeOx thin films Y. Batra, S.A. Khan, D. Kabiraj, Sandeep Kumar and D. Kanjilal, Nucl. Instr. And Meth. B 266, 1697 (2008).
  35. Effect of swift heavy ion irradiation on deep levels in Au/n-Si (100) Schottky diodes studied by deep level transient spectroscopy Sandeep Kumar, Y.S. Katharria, Sugam Kumar and D. Kanjilal, J. Appl. Phys. 102, 113709 (2007).
  36. Influence of swift heavy ion irradiation on electrical characteristics of Au/n-Si(100) Schottky structure Sandeep Kumar, Y.S. Katharria, Y. Batra and D. Kanjilal, J. Phys. D: Appl. Phys. 40, 6892 (2007).
  37. Self-organization of 6H-SiC (0001) surface under keV ion Irradiation Y. S. Katharria, Sandeep Kumar, P. S. Lakshmi, D. Kanjilal and  A. T. Sharma, J. Appl. Phys. 102, 044301 (2007).
  38. Nano and micro-scale patterning of Si under ion erosion Y. S. Katharria, Sandeep Kumar,  A. T. Sharma and D. Kanjilal, Appl. Surf. Sci. 253, 6824 (2007).
  39. Characterizations of pulsed laser deposited SiC thin films Y. S. Katharria, Sandeep Kumar, R. Prakash, R.J. Choudhary and D. Kanjilal, J. of Non-Crystalline Solids 353, 4660 (2007).
  40. Influence of SHI irradiation on the formation of buried SiC Y. S. Katharria, Sandeep Kumar, and D. Kanjilal, Nucl. Instru. And Meth. B, 260, 563 (2007).
  41. Ion-beam-induced phase separation in GeOx thin films Y. Batra, D. Kabiraj, Sandeep Kumar and D. Kanjilal, J. Phys. D: Appl. Phys. 40, 4568 (2007).
  42. Effect of swift heavy ion irradiation on electrical characteristics of Au/n-GaAs Schottky diodes A. T. Sharma, Sahanawz, Sandeep Kumar, Y. S. Katharria and D. Kanjilal, Appl. Surf. Sci. 254, 459 (2007).
  43. Barrier modification of Au/n-GaAs Schottky diode by swift heavy ion irradiation A. T. Sharma, Sahanawz, Sandeep Kumar, Y. S. Katharria and D. Kanjilal, Nucl. Instr. And Meth. B, 263, 424 (2007).
  44. Temperature dependent barrier characteristics of swift heavy ion irradiated Au/n-Si Schottky structure Sandeep Kumar, Y.S. Katharria, Sugam Kumar and D. Kanjilal, J. Appl. Phys. 100, 113723 (2006).
  45. Synthesis of buried SiC using energetic ion beam Y. S. Katharria, Sandeep Kumar, F. Singh, J.C. Pivin and D. Kanjilal, J. Phys. D: Appl. Phys. 39, 3969 (2006).
  46. Temperature dependence of barrier height of swift heavy ion irradiated Au/n-Si Schottky structure Sandeep Kumar, Y.S. Katharria, S. Kumar and D. Kanjilal, Solid State Electron. 50, 1835 (2006).
  47. Barrier height modification of Au/n-Si Schottky structures by swift heavy ion irradiation  Sandeep Kumar and D. Kanjilal, Nucl. Instr. And Meth. B, 248, 109 (2006).
  • Study of resistive switching mechanism in ion irradiated ZnO nanorods (IUAC, New Delhi) 2021-2024
  • Electrical field-controlled magnetism in semiconductor nanowires (DST-SERB, India) 2017-2020
  • Synthesis of semiconductor nanowires for spintronics(UGC, New Delhi,India) 2017-2018
  • Ion beam induced modification of transport properties of Mn doped GaAs nanowires (IUAC, New Delhi) 2015-2018
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