Topological Nodal Point Superconductivity in Checkerboard Magnet-Superconductor Hybrid Systems

TL;DR

This paper explores how checkerboard magnet-superconductor hybrid systems can host diverse topological superconducting phases, including nodal point and strong topological phases, through atomic manipulation techniques.

Contribution

It introduces the existence of both strong topological and nodal point superconducting phases in checkerboard magnet-superconductor systems, expanding the understanding of topological phases in such hybrid structures.

Findings

Presence of TNPSC phases in ferromagnetic and antiferromagnetic systems

Emergence of STSC phases even with minimal magnetization

Rich edge mode structures in different phases

Abstract

We demonstrate that checkerboard magnet-superconductor hybrid systems possess a rich phase diagram exhibiting both strong topological superconducting (STSC) and topological nodal point superconducting (TNPSC) phases. We show that TNPSC phases exist both for ferromagnetic and antiferromagnetic systems, yielding a plethora of qualitatively different edge mode structures. Checkerboard MSH systems also facilitate the emergence of STSC phases which can be induced even in the limit of vanishing magnetization. Our results provide a new path for the quantum engineering of topological superconducting phases using atomic manipulation techniques.