Topological Superconductivity in Rashba Spin-Orbital Coupling Suppressed Monolayer \{beta}-Bi2Pd

TL;DR

This study reveals that monolayer Bi2Pd can host spin-triplet p-wave superconductivity with Majorana zero modes, driven by non-Rashba spin-orbital coupling, advancing understanding of topological superconductivity in 2D materials.

Contribution

The paper demonstrates the critical role of non-Rashba spin-orbital coupling in inducing and tuning topological superconductivity in monolayer Bi2Pd, revealing new topological phases.

Findings

Identification of Majorana zero modes in monolayer Bi2Pd

Role of non-Rashba spin-orbital coupling in topological phase transition

Prediction of spin-triplet p-wave pairing in monolayer Bi2Pd

Abstract

The weak interlayer Van Der Waals material \{beta}-Bi2Pd has recently been established as a strong topological superconductor candidate with unconventional spin-triplet pairing and Majorana zero modes at vortices. In this letter, we study the topological characters and the superconducting pairing, which are still obscure in monolayer \{beta}-Bi2Pd, in light of our effective theoretical model. We find that the non-Rashba spin-orbital coupling plays a critical role in realizing and tuning various novel topological natures. In particular, the spin-triplet p-wave superconducting pairing with Majorana zero mode is revealed in monolayer \{beta}-Bi2Pd. Our studies deepen the understanding of topology and superconductivity in monolayer \{beta}-Bi2Pd and indicate it is a promising platform for achieving low-dimentional topological superconductivity.