i-Josephson Junction as Topological Superconductor
Mesoscale and Nanoscale Physics
2018-10-03 v2 Superconductivity
Abstract
We show that the time reversal symmetry inevitably breaks in a superconducting Josephson junction formed by two superconductors with different pairing symmetries dubbed as i-Josephson junction. While the leading conventional Josephson coupling vanishes in such an i-Josephson junction, the second order coupling from tunneling always generates chiral superconductivity orders with broken time reversal symmetry. Josephson frequency in the i-junction is doubled, namely . The result provides a way to engineer topological superconductivity such as the d + id' -wave superconducting state characterized by a nonzero Chern number.
Keywords
Cite
@article{arxiv.1801.08689,
title = {i-Josephson Junction as Topological Superconductor},
author = {Zhesen Yang and Shengshan Qin and Qiang Zhang and Chen Fang and Jiangping Hu},
journal= {arXiv preprint arXiv:1801.08689},
year = {2018}
}
Comments
5 pages, 4 figures