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个人简介
Dr. Gyanendra Singh has led successful research in spin-orbitronics, mesoscopic quantum transport, and two-dimensional topological superconductivity. This activity has led to fundamental discoveries related, among others, to the first observation of unconventional superconductivity in oxide quantum wells, and gate-tunable multi-condensates superconductivity. These contributions have had a strong impact in the scientific community, with publications in top-rank journals. In the following, I describe a concise chronological account of my scientific career.
Ph.D (07/2005 – 07/2013): I obtained my Ph.D in 2013 from a prestigious institution of India, Indian Institute of Technology, Kanpur, under the supervision of Prof. Ramesh C. Budhani, for his dissertation on superconductor-ferromagnet thin-film heterostructures. I investigated the interfacial proximity effect between superconducting and ferromagnetic thin films fabricated using the pulsed laser deposition technique. During this tenure, I was in charge of low-temperature transport and ultra-high-vacuum scanning probe microscopy (SPM) unit (https://www.iitk.ac.in/cmlds/old/facilities.html).
During my PhD, I developed a strong interest in a new class of emerging quantum materials (oxide interfaces), exhibiting a high mobility 2D electron gas appearing at the interface of two insulating oxides band insulators. The system has a unique combination of gate tunable Rashba spin-orbit coupling, 2D superconductivity, magnetism, and may generate topological superconductivity and highly efficient spin currents.
Postdoc1 (period 04/2013 – 06/2018): I fulfilled this interest of research as a postdoctoral researcher in the group of Prof. Jerome Lesueur and Prof. Nicolas Bergeal in ESPCI-CNRS Paris, which has recognized expertise in the field of quantum transport and superconducting electronics. I was responsible for the design and setup of both DC and microwave (20 GHz) transport in a newly purchased dilution refrigerator. This set-up is adapted for microwave measurement of superconducting qubits. I used these techniques to investigate the exotic properties of 2D oxide interfaces.
The outcome of the research reported in high impact research publications as a first author (Nature Communications 9, 407 (2018) and Nature Materials 18, 948 (2019)) covers a broad area of topics starting from DC to microwave transport and macroscopic to mesoscopic devices, which are relevant for both fundamental and application point of view. The paper, Nature materials, 18, 948 (2019), shows first-ever observation in a superconductor of single to multi-condensate transition by electrostatic gating. As an impact, the paper received special focus on the front page of Nature Materials issue 9, volume 18, September 2019, and news and views in Nature Materials 18, 913 (2019).
Postdoc2 (period 10/2018 – 02/2021): To gain expertise in nanodevice fabrication, he then moved to Chalmers University of Technology, Gothenburg, Sweden, in the group of Alexei Kalaboukhov and Dag Winkler. I worked on project QUANTOX within European Union, Horizon 2020 QuantERA program. I have investigated unconventional 2D superconductivity in nano-devices of oxide interfaces. The research involved fabricating nano-devices using double-step advanced electron beam lithography and measuring them in dilution refrigerators. The result published recently in npj Quantum Materials vol. 7, Article number: 2 (2022), where I am the first and the corresponding author, shows a first observation of unconventional 2D superconductivity in Oxide interfaces. I have co-supervised a master thesis of Paul Burger.
Current research (03/2021 – current): I am currently a postdoctoral researcher at Institute de Ciència de Materials de Barcelona ICMAB-CSIC, Barcelona Spain. The research project was granted (score 9.61) by the Catalan science and technology system, through the AGAUR Beatriu de Pinós program (BP 2019). I am investigating the possibilities of Nonvolatile All-Electrical Nonmagnetic Spin Transistors based on two-dimensional Rashba interfaces and topological 2D Materials. Within one year of my stay at ICMAB-CSIC, I have designed and set up a fully motorized van-der-walls materials flakes transfer system.
Area of research Interest:
1- Experimental condensed matter physics, surface, interface and thin film.
2- Superconductivity in emergent low dimensional materials and corresponding electronics, Superconducting quantum electronics, Qubits, Majorana fermions.
3- Quantum transport, nanoscale devices.
4- Rashba Spin-orbit coupling, Non-local spin transport in two dimensions (Spin- Orbitronics).
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Communications Physicsno. 1 (2024): 1-9
G. Singh,G. Venditti, G. Saiz,G. Herranz,F. Sánchez, A. Jouan, C. Feuillet-Palma, J. Lesueur,M. Grilli,S. Caprara, N. Bergeal
Physical Review Bno. 6 (2022)
Physical reviewno. 6 (2022)
arXiv (Cornell University) (2021)
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