# Majorana corner modes in a high-temperature platform

## TL;DR

This paper proposes a high-temperature platform for Majorana Kramers pairs using topological insulators coupled with high-$T_c$ superconductors, where pairing symmetry induces corner-localized Majorana zero modes.

## Contribution

It introduces a novel approach to realize Majorana zero modes at high temperatures using topological insulators and high-$T_c$ superconductors, with specific criteria and candidate materials.

## Key findings

- Proposes a topologically trivial superconductor-based method for Majorana modes.
- Identifies pairing symmetry as a key factor for corner Majorana modes.
- Suggests candidate materials for experimental realization.

## Abstract

We introduce two-dimensional topological insulators in proximity to high-temperature cuprate or iron-based superconductors as high-temperature platforms of Majorana Kramers pairs of zero modes. The proximity-induced pairing at the helical edge state of the topological insulator serves as a Dirac mass, whose sign changes at the sample corner because of the pairing symmetry of high-$T_c$ superconductors. This sign changing naturally creates at each corner a pair of Majorana zero modes protected by time-reversal symmetry. Conceptually, this is a topologically trivial superconductor-based approach for Majorana zero modes. We provide quantitative criteria and suggest candidate materials for this proposal.