Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Low-Energy Surface States in the Normal State of $\alpha$-PdBi2
  Superconductor   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.

29
The categories of this paper are: funct-an
3
The categories of this paper are: physics
27
The categories of this paper are: comp-gas
12
The categories of this paper are: nucl-th
18
The categories of this paper are: econ
24
The categories of this paper are: dg-ga
13
The categories of this paper are: quant-ph
21
The categories of this paper are: adap-org
34
The categories of this paper are: chem-ph
28
The categories of this paper are: alg-geom
30
The categories of this paper are: q-alg
8
The categories of this paper are: hep-ex
1
The categories of this paper are: cs
6
The categories of this paper are: astro-ph
33
The categories of this paper are: plasm-ph
7
The categories of this paper are: hep-th