by
DrNoah Fan Qi Yuan(Harbin Institute of Technology (Shenzhen))
→
Asia/Shanghai
TDLI Meeting Room N600 (East Wing of Floor 6, North Building)
TDLI Meeting Room N600 (East Wing of Floor 6, North Building)
Description
Abstract
In superconductors breaking both time and inversion symmetries, the supercurrent diode effect arises. We self-consistently calculate the supercurrent diode effect from microscopic models of two- dimensional clean superconductors with spin-orbit coupling under external Zeeman fields, and show that supercurrent diode effect is closely related to the underlying crystal point group symmetry. We then apply our general theory to various superconducting materials including twisted bilayer graphene and topological semimetals, which agree well with our theory.
References:
Noah F. Q. Yuan, Edelstein effect and supercurrent diode effect, arXiv:2311.11087.
Banabir Pal et. al., Josephson diode effect from Cooper pair momentum in a topological semimetal, Nat. Phys. 18, 1228 (2022).
Noah F. Q. Yuan and Liang Fu, Supercurrent diode effect and finite momentum superconductivity, PNAS 119 (15), e2119548119 (2022).
Biography
Dr. Noah Fan Qi Yuan got his PhD at the Hong Kong University of Science and Technology in 2017. After that he went to Massachusetts Institute of Technology as a Postdoc from 2017 to 2020. He becomes an associate professor at the Harbin Institute of Technology (Shenzhen) since 2021. His interests include mainly the theory of unconventional superconductivity, such as finite-momentum super-conductivity, two-dimensional superconductivity and topological superconductivity.
