Topologically protected surface states in a centrosymmetric superconductor β-PdBi2.

ABSTRACT: The topological aspects of electrons in solids can emerge in real materials, as represented by topological insulators. In theory, they show a variety of new magneto-electric phenomena, and especially the ones hosting superconductivity are strongly desired as candidates for topological superconductors. While efforts have been made to develop possible topological superconductors by introducing carriers into topological insulators, those exhibiting indisputable superconductivity free from inhomogeneity are very few. Here we report on the observation of topologically protected surface states in a centrosymmetric layered superconductor, β-PdBi2, by utilizing spin- and angle-resolved photoemission spectroscopy. Besides the bulk bands, several surface bands are clearly observed with symmetrically

SUBMITTER: Sakano M 

PROVIDER: S-EPMC4633943 | biostudies-literature | 2015 Oct

REPOSITORIES: biostudies-literature