Tunable Majorana corner modes by orbital-dependent exchange interaction in a two-dimensional topological superconductor

TL;DR

This paper theoretically investigates how orbital-dependent exchange interactions can induce and control Majorana corner modes in a 2D topological superconductor, proposing detection via conductance quantization.

Contribution

It introduces a method to manipulate Majorana corner modes through orbital-dependent exchange fields in a 2D topological superconductor.

Findings

Orbital difference induces topological transitions.

Majorana corner modes can be manipulated by changing orbital interactions.

Conductance quantization remains robust under parameter variations.

Abstract

We theoretically study the effect of orbital-dependent exchange field in the formation of second order topological superconductors. We demonstrate that changing the orbital difference can induce topological transition and the Majorana corner modes therein can be manipulated. We further propose to detect the corner modes via a normal probe terminal. The conductance quantization is found to be robust to changes of the relevant system parameters.