Superlattice platform for chiral superconductivity with tuneable and high Chern numbers

TL;DR

This paper proposes a universal platform using nanomagnet lattices on spin-orbit coupled 2DEGs with superconductivity to realize and control chiral topological phases with high Chern numbers.

Contribution

It introduces a systematic method to realize tunable chiral superconductivity with high Chern numbers in a nanomagnet-2DEG hybrid system.

Findings

Platform supports a variety of topological phases.

Electrical tuning controls the topological state.

Supports high Chern number chiral superconductivity.

Abstract

Finding concrete realizations for topologically nontrivial chiral superconductivity has been a long-standing goal in quantum matter research. Here we propose a route to a systematic realization of chiral superconductivity with nonzero Chern numbers. This goal can be achieved in a nanomagnet lattice deposited on top of a spin-orbit coupled two-dimensional electron gas (2DEG) with proximity s-wave superconductivity. The proposed structure can be regarded as a universal platform for chiral superconductivity supporting a large variety of topological phases. The topological state of the system can be electrically controlled by, for example, tuning the density of the 2DEG.