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Title

Experimental verification of PbBi2Te4 as a 3D topological insulator

AuthorsKuroda, K.; Ye, M.; Eremeev, S. V.; Koroteev, Yuri M.; Krasovskii, E. E.; Chulkov, Eugene V. ; Miyamoto, Koji; Shimada, K.; Namatame, H.; Taniguchi, M.; Ueda, Y.; Kimura, A.
Issue Date2012
PublisherAmerican Physical Society
CitationPhysical Review Letters 108: 206803 (2012)
AbstractThe experimental evidence is presented of the topological insulator state in PbBi 2Te 4. A single surface Dirac cone is observed by angle-resolved photoemission spectroscopy with synchrotron radiation. Topological invariants Z 2 are calculated from the ab initio band structure to be 1;(111). The observed two-dimensional isoenergy contours in the bulk energy gap are found to be the largest among the known three-dimensional topological insulators. This opens a pathway to achieving a sufficiently large spin current density in future spintronic devices. © 2012 American Physical Society.
Descriptionet al.
Publisher version (URL)http://dx.doi.org/10.1103/PhysRevLett.108.206803
URIhttp://hdl.handle.net/10261/102074
DOI10.1103/PhysRevLett.108.206803
Identifiersdoi: 10.1103/PhysRevLett.108.206803
issn: 0031-9007
e-issn: 1079-7114
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