Inducing topological superconductivity at the LaAlO3/SrTiO3 interface

International Conference on Strongly Correlated Electron Systems 2014

Mohanta, N.^1 ; Taraphder, A.^1,2

Department of Physics, Indian Institute of Technology Kharagpur, W. B. 721302, India^1

Centre for Theoretical Studies, Indian Institute of Technology Kharagpur, W. B. 721302, India^2

关键词: Finite momentum;    In-plane magnetization;    Interface planes;    Rashba spin orbit interaction;    Superconducting phase;    Superconducting state;    Two bands;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/592/1/012126/pdf
DOI  :  10.1088/1742-6596/592/1/012126

来源: IOP

【 摘 要 】

The discovery of superconductivity in the two-dimensional electron gas at the interface between two band insulators SrTiO3and LaAlO3has opened up possibilities for novel physics. We show that due to the presence of Rashba spin-orbit interaction at the interface, a topological superconductivity can be induced by applying a magnetic field perpendicular to the interface plane even in the presence of the intrinsic in-plane magnetization. The inplane magnetization favours a finite momentum pairing of electrons and therefore weakens the topological superconducting phase. We show that the tunable Rashba spin-orbit interaction can help in stabilizing the topological superconducting state against the deleterious in-plane magnetization.