Observation Of The Spin-Polarized Surface State In A Noncentrosymmetric Superconductor Bipd

Abstract

Recently, noncentrosymmetric superconductor BiPd has attracted considerable research interest due to the possibility of hosting topological superconductivity. Here we report a systematic high-resolution angle-resolved photoemission spectroscopy (ARPES) and spin-resolved ARPES study of the normal state electronic and spin properties of BiPd. Our experimental results show the presence of a surface state at higher-binding energy with the location of Dirac point at around 700 meV below the Fermi level. The detailed photon energy, temperature-dependent and spin-resolved ARPES measurements complemented by our first-principles calculations demonstrate the existence of the spin-polarized surface states at high-binding energy. The absence of such spin-polarized surface states near the Fermi level negates the possibility of a topological superconducting behaviour on the surface. Our direct experimental observation of spin-polarized surface states in BiPd provides critical information that will guide the future search for topological superconductivity in noncentrosymmetric materials.

Publication Date

1-1-2016

Publication Title

Nature Communications

Volume

7

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1038/ncomms13315

Socpus ID

85034704178 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/85034704178

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