In-plane ferromagnetism-driven topological nodal-point superconductivity with tilted Weyl cones

TL;DR

This paper demonstrates a new topological nodal-point superconducting phase in a one-atom-thick in-plane ferromagnet coupled with an s-wave superconductor, revealing tilted Weyl cones through spectroscopic evidence.

Contribution

It introduces a novel topological phase arising from in-plane ferromagnetism and conventional superconductivity in a 2D system, supported by experimental and theoretical analysis.

Findings

Detection of a double-peak feature in local density of states

Identification of topological nodal-point superconductivity with tilted Weyl cones

Establishment of a new route to design 2D topological quantum phases

Abstract

The potential application of topological superconductivity in quantum transport and quantum information has fueled an intense investigation of hybrid materials with emergent electronic properties, including magnet-superconductor heterostructures. Here, we report evidence of a topological nodal-point superconducting phase in a one-atom-thick in-plane ferromagnet in direct proximity to a conventional $s$-wave superconductor. Low-temperature scanning tunneling spectroscopy data reveal the presence of a double-peak low-energy feature in the local density of states of the hybrid system, which is rationalized via model calculations to be an emergent topological nodal-point superconducting phase with tilted Weyl cones. Our results further establish the combination of in-plane ferromagnetism and conventional superconductivity as a route to design two-dimensional topological quantum phases.