Quasiparticle states and quantum interference induce by magnetic impurities on a two-dimensional topological superconductor

TL;DR

This paper theoretically investigates how magnetic impurities affect the local electronic states and quantum interference in a two-dimensional topological superconductor, revealing tunable LDOS and impurity-induced bound states.

Contribution

It introduces a detailed theoretical analysis of magnetic impurity effects on 2D TSC, including LDOS tuning, interference effects, and comparisons with topological insulators.

Findings

LDOS can be tuned by exchange field, chemical potential, impurity distance, and spin angle.

Impurity interference modifies bonding and antibonding states.

Bound-state spin LDOS and quantum mirages are characterized.

Abstract

We theoretically study the effect of localized magnetic impurities on two-dimensional topological superconductor (TSC). We show that the local density of states (LDOS) can be tuned by the effective exchange field $m$, the chemical potential $\mu$ of TSC, and the distance $\Delta r$ as well as relative spin angle $\alpha$ between two impurities. The changes in $\Delta r$ between two impurities alter the interference and result in significant modifications to the bonding and antibonding states. Furthermore, the bound-state spin LDOS induced by single and double magnetic impurity scattering, the quantum corrals, and the quantum mirages are also discussed. Finally, we briefly compare the impurities in TSC with those in topological insulators.