# Low-Energy Surface States in the Normal State of $\alpha$-PdBi2 Superconductor

## TL;DR

This study predicts that the superconductor $ ext{α}$-PdBi2 hosts unique Rashba surface states in its normal state, making it a promising candidate for exploring the interplay between superconductivity and topological surface phenomena.

## Contribution

First prediction of orbital-dependent and asymmetric Rashba surface states in $ ext{α}$-PdBi2 using density functional theory, linking its normal state to topological properties.

## Key findings

- Prediction of Rashba surface states near the Fermi energy.
- Identification of orbital-dependent and asymmetric surface states.
- Implication for future studies on superconductivity and topology.

## Abstract

Topological superconductors as characterized by Majorana surface states has been actively searched for their significance in fundamental science and technological implication. The large spin-orbit coupling in Bi-Pd binaries has stimulated extensive investigations on the topological surface states in these superconducting compounds. Here we report a study of normal-state electronic structure in a centrosymmetric $\alpha$-PdBi2 within density functional theory calculations. By investigating the electronic structure from the bulk to slab geometries in this system, we predict for the first time that $\alpha$-PdBi2 can host orbital-dependent and asymmetric Rashba surface states near the Fermi energy. This study suggests that $\alpha$-PdBi2 will be a good candidate to explore the relationship between superconductivity and topology in condensed matter physics.