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

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.

References in corpus (41)

• Topological Insulators
• Topological insulators and superconductors
• Superconducting proximity effect and Majorana fermions at the surface of a topological insulator
• Unpaired Majorana fermions in quantum wires
• Signatures of Majorana fermions in hybrid superconductor-semiconductor nanowire devices
• Classification of topological insulators and superconductors in three spatial dimensions
• New directions in the pursuit of Majorana fermions in solid state systems
• A generic new platform for topological quantum computation using semiconductor heterostructures
• Periodic table for topological insulators and superconductors
• Search for Majorana fermions in superconductors
• Superconductivity in CuxBi2Se3 and its implications for pairing in the undoped topological insulator
• Non-Abelian Topological Order in S-Wave Superfluids of Ultracold Fermionic Atoms
• Topological Superconductivity in CuxBi2Se3
• Topological Phases of Noncentrosymmetric Superconductors: Edge States, Majorana Fermions, and the Non-Abelian Statistics
• The Coexistence of Superconductivity and Topological Order in the Bi2Se3 Thin Films
• Manipulation of Majorana fermion, Andreev reflection and Josephson current on topological insulators
• Observation of topological order in a Superconducting doped topological insulator (based on the Bi2Se3 class)
• Pressure induced Superconductivity in Topological Compound Bi2Te3
• Bulk superconducting phase with a full energy gap in the doped topological insulator Cu_xBi_2Se_3
• Topological superconductivity on the surface of Fe-based superconductors
• Superconductivity with topological surface state in SrxBi2Se3
• Observation of superconductivity in 3D Dirac semimetal Cd3As2 crystal
• Odd-Parity Pairing and Topological Superconductivity in a Strongly Spin-Orbit Coupled Semiconductor
• Superconductivity in Topological Insulator Sb2Te3 Induced by Pressure
• Anomalous Andreev bound state in non-centrosymmetric superconductors
• Momentum space imaging of Cooper pairing in a half-Dirac-gas topological superconductor (a helical 2D topological superconductor)
• Topologically protected surface states in a centrosymmetric superconductor beta-PdBi2
• Majorana Fermions in Nodal Superconductors: Gapless Topological Phase
• Surface bound states and spin currents in non-centrosymmetric superconductors
• Dirac Surface States and Nature of Superconductivity in Noncentrosymmetric BiPd
• Andreev bound states and tunneling characteristics of a non-centrosymmetric superconductor
• Superconductivity at 5.4 K in $\beta$-Bi${}_2$Pd
• Observation of the spin-polarized surface state in a noncentrosymmetric superconductor BiPd
• Single gap superconductivity in beta-Bi2Pd
• Fully gapped superconductivity in the topological superconductor beta-PdBi2
• Evolution of Edge States and Critical Phenomena in the Rashba Superconductor with Magnetization
• Observation of Dirac surface states in the noncentrosymmetric superconductor BiPd
• Probing the superconducting gap symmetry of $\alpha$-PdBi${}_2$: A penetration depth study
• Unusual Dirac fermions on the surface of noncentrosymmetric $\alpha$ - BiPd superconductor
• Electronic structure and relaxation dynamics in a superconducting topological material
• Superconductivity by Sr Intercalation in Layered Topological Insulator Bi2Se3

Cited by in corpus (4)

• Multiple Topological Electronic Phases in Superconductor MoC
• Dirac State in a Centrosymmetric Superconductor alpha-PdBi2
• Unconventional pressure dependence of the superfluid density in the nodeless topological superconductor $\alpha$-PdBi${}_2$
• Superconductivity in Bi based Bi2PdPt