# Topological superconductivity from magnetic impurities on monolayer NbSe$_2$

## TL;DR

This paper explores how magnetic impurity chains on monolayer NbSe2 can host topological superconducting phases with Majorana bound states, influenced by spin-orbit coupling and impurity configurations.

## Contribution

It demonstrates the conditions for topological phases and Majorana states in magnetic impurity chains on monolayer NbSe2, highlighting the role of Ising spin-orbit coupling.

## Key findings

- Topological phases are stabilized by strong Ising spin-orbit coupling.
- Majorana bound states appear at the edges of impurity chains.
- Conditions depend on impurity spacing, spin projection, and magnetic exchange strength.

## Abstract

Recent experimental studies have found that magnetic impurities deposited on superconducting monolayer NbSe$_2$ generate coupled Yu-Shiba-Rusinov bound states. Here we consider ferromagnetic chains of impurities which induce a Yu-Shiba-Rusinov band and harbor Majorana bound states at the chain edges. We show that these topological phases are stabilized by strong Ising spin-orbit coupling in the monolayer and examine the conditions under which Majorana phases appear as a function of distance between impurities, impurity spin projection, orientation of chains on the surface of the monolayer, and strength of magnetic exchange energy between impurity and superconductor.