Current inversion in a chiral d-wave superconductor due to surface roughness

International Conference on Strongly Correlated Electron Systems 2016

Suzuki, Shu-Ichiro^1 ; Asano, Yasuhiro^1,2,3

Department of Applied Physics, Hokkaido University, Kita 13 Nishi 8, Sapporo

060-8628, Japan^1

Center of Topological Science and Technology, Hokkaido University, Kita 13 Nishi 8, Sapporo

060-8628, Japan^2

Moscow Institute of Physics and Technology, Dolgoprudny

141700, Russia^3

关键词: d-Wave superconductors;    Edge currents;    Pair potential;    Quasi-classical Eilenberger equations;    Self-consistent solution;    Vector potential;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/807/10/102001/pdf
DOI  :  10.1088/1742-6596/807/10/102001

来源: IOP

【 摘 要 】

We report the effects of surface roughness on the edge current in a chiral d-wave superconductors. By solving the quasiclassical Eilenberger equation and the Maxwell equation simultaneously, we obtained self-consistent solutions of the pair potential and the vector potential. We calculate numerically the spatial distribution of the chiral edge current in a small superconductor with and without surface roughness. The edge current in a d-wave superconductor is robust against surface roughness. Its direction, however, is inverted by surface roughness.