A New Platform for Engineering Topological Superconductors: Superlattices on Rashba Superconductors

TL;DR

This paper proposes a novel experimental approach to engineer topological superconductors using superlattices of organic molecules on Rashba superconductors, enabling control over topological phases without fine-tuning the chemical potential.

Contribution

It introduces a new method for creating topological superconductors through superlattice manipulation, avoiding the need for chemical potential fine-tuning.

Findings

Topological superconducting phases can be achieved without fine-tuning the chemical potential.

Different Chern numbers can be realized by changing the superlattice structure.

The scheme provides a versatile platform for engineering topological superconductors.

Abstract

The search for topological superconductors which support Majorana fermion excitations has been an important topic in condensed matter physics. In this work, we propose a new experimental scheme for engineering topological superconductors. In this scheme, by manipulating the superlattice structure of organic molecules placed on top of a superconductor with Rashba spin-orbit coupling, topological superconducting phases can be achieved without fine-tuning the chemical potential. Moreover, superconductors with different Chern numbers can be obtained by changing the superlattice structure of the organic molecules.