Topological Superconductivity in Bilayer Rashba System

Sho Nakosai; Yukio Tanaka; Naoto Nagaosa

doi:10.1103/PhysRevLett.108.147003

← Back to search

Topological Superconductivity in Bilayer Rashba System

Sho Nakosai, Yukio Tanaka, Naoto Nagaosa

DOI 10.1103/PhysRevLett.108.147003 · Physical Review Letters

T1

Active bibliographic source — not scientific approval

Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.

Abstract

We theoretically study a possible topological superconductivity in the interacting two layers of Rashba systems, which can be fabricated by the heterostructures of semiconductors and oxides. The hybridization, which induces the gap in the single particle dispersion, and the electron-electron interaction between the two layers leads to the novel phase diagram of the superconductivity. It is found that the topological superconductivity without breaking time-reversal symmetry is realized when (i) the Fermi energy is within the hybridization gap, and (ii) the interlayer interaction is repulsive, both of which can be satisfied in realistic systems. Edge channels are studied in a tight-binding model numerically, and the several predictions on experiments are also given.