Dr. R.K. Gopal

Biography:

Dr. R.K. Gopal is an assistant professor in the Department of Physics. He has done his M.Sc. from department of physics, Institute of Science, Banaras Hindu University, and PhD from Indian Institute of Science Education and Research Kolkata (IISER-Kolkata). After his PhD, he was a postdoctoral fellow in Department of Physical Sciences, Indian Institute of Science Bangalore (IISc. Bangalore), IISER-Mohali, JNCASR-Bangalore and senior research associate at Hebrew University of Jerusalem, Israel. He has been teaching physics from last eight months and joined JIIT in July-2023.

At present Dr. Gopal is working on topological quantum materials, which includes three dimensional topological semimetals and topological insulators thin film and devices in two-dimensions. His particular interest is in the low-temperature quantum transport measurements to investigate the role of disorder on the electronic transport of these topological quantum materials. Recently, he has started probing ultrafast Dirac fermion dynamics in these topological quantum materials, by utilizing terahertz time-domain spectroscopy in collaboration with Professor Kamraju at IISER-Kolkata.

Journal Publications

International Publications

Suggested Format (IEEE):

• Riddhimoy. Pathak, Prabir. Dutta, Ashutosh Srivastava, Divya. Rawat, R.K. Gopal, Abhishek. K. Singh, Ajay. Soni, Kanishka. Biswas., " Strong Anharmonicity‐Induced Low Thermal conductivity and High n‐type Mobility in Topological Insulator Bi1.1Sb0.9Te2S," Angew. Chem. Int. Ed. 2022, Volume134, Issue41, e202210783 October 10, 2022.
• Shama, RK. Gopal, Goutam. Sheet, Yogesh. Singh, “2D weak anti-localization in thin films of the topological semimetal PdBiS,” Scientific Reports volume 11, Article number: 12618, June 2021.  
• Amit. Vashist, RK. Gopal, Yogesh. Singh, “Anomalous negative longitudinal magnetoresistance and violation of Ohm's law deep in the topological insulating regime in BiSb,” Scientific Reports volume 11, Article number: 8756, April, (2021).
• Shama, R.K. Gopal, Yogesh. Singh, “Observation of planar Hall effect in the ferromagnetic Weyl semimetal Co3Sn2S2,” Journal of Magnetism and Magnetic Materials,volume 502, 166547, May 2020.  
• Neha. Wadehra, Ruchi. Tomar, Rahul Mahavir. Varma, RK. Gopal, Yogesh. Singh, Sushanta. Dattagupta, S. Chakraverty,” Nature Communications, volume 11, Article number, 874, February 2020.
• Amit. Vashist, R.K. Gopal, and Yogesh. Singh, “The de Haas–van Alphen Effect Study of the Fermi Surface of LaBi,” JPS Conf. Proc. 30, 011019, (2020). 
• Amit, R. K. Gopal, Neha Wadehra, S. Chakraverty, and Yogesh. Singh, “Type-II Dirac semimetal candidates ATe2 (A= Pt, Pd): A de Haas-van Alphen study,” Phys. Rev. Materials 2, 114202, November 2018.
• Sangram. Biswas, RK. Gopal, Sourabh. Singh, Raushan. Kant, Chiranjib. Mitra, Aveek. Bid, “Resistance fluctuation spectroscopy of thin films of 3D topological insulator BiSbTeSe1.6,” Applied Physics Letters, 115, 131601, September 2019.  
• Amit. Vashist#, RK. Gopal#, Divya. Srivastava, M. Karppinen, Yogesh. Singh, “Fermi surface topology and large magnetoresistance in the topological semimetal candidate PrBi,” Phys. Rev. B, 99, 24513, June 2019. (# Equal First Authership).
• Sourabh. Singh#, RK. Gopal#, Jit. Sarkar, Atul. Pandey, Bhavesh G. Patel, Chiranjib. Mitra, “Linear magnetoresistance and surface to bulk coupling in topological insulator thin films,” Journal of Physics: Condensed Matter, 29, 50, 505601, November 2017. (# Equal First authership). 
• R. K. Gopal, Sourabh. Singh, Jit. Sarkar, Chiranjib. Mitra, “Tuning chemical potential in the Dirac cone by compositional engineering,” AIP Advances 7, 105112, October, 2017.  
• R. K. Gopal, Deepak KS. Ambast, Sourabh. Singh, Jit. Sarkar, Bipul. Pal, Chiranjib. Mitra, “Bulk saturable absorption in topological insulator thin films,” J. Appl. Phys. 122, 035705, July 2017.
• R. K. Gopal, Sourabh. Singh, Arpita. Mandal, Jit. Sarkar, Chiranjib. Mitra, “Topological delocalization and tuning of surface channel separation in Bi2Se2Te Topological Insulator Thin films,” Scientific Reports, volume 7, Article number: 4924, July, 2017.  
• Uditendu. Mukhopadhyay, Dipanjan. Chaudhuri, Jit. Sarkar, Sourabh. Singh, R. K. Gopal, Sandeep. Tammu, Prashanth C. Upadhya, Chiranjib. Mitra, “Surface optical and bulk acoustic phonons in the topological insulator, Bi2Se2Te,” Appl. Phys. Lett. 106, 241106, July 2015.  
• Anirudha. Ghosh, Sanhita. Paul, RK. Gopal, Satyabrata. Raj, “High‐temperature ferromagnetism in Fe‐doped wurtzite and zincblende CdS nanoparticles,” physica status solidi (b), Volume 252, Issue 6, Pages, 1355-1362, June 2015.  
• R. K. Gopal, Sourabh. Singh, Ramesh. Chandra, Chiranjib. Mitra, “Weak-antilocalization and surface dominated transport in topological insulator Bi2Se2Te,” AIP Advances, 5, 047111, April 2015.  
• Tanmoy. Chakraborty, Harkirat. Singh, Sourabh. Singh, R. K. Gopal, Chiranjib. Mitra, “Probing quantum discord in a Heisenberg dimer compound,” J. Phys.: Condens. Matter, 25, 425601, September 2013.  
• Diptaranjan. Das, Harkirat. Singh, Tanmoy. Chakraborty, R. K. Gopal, Chiranjib. Mitra, “Experimental detection of quantum information sharing and its quantification in quantum spin systems,” New J. Phys. 15, 013047, January 2013.