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Disentanglement of surface and bulk rashba spin splittings in noncentrosymmetric BiTeI

AuthorsLandolt, Gabriel; Eremeev, S. V.; Koroteev, Yuri M.; Slomski, Bartosz; Kobayashi, Masaki; Aliev, Ziya S.; Chulkov, Eugene V. ; Dil, J. Hugo
Issue Date2012
PublisherAmerican Physical Society
CitationPhysical Review Letters 109: 116403 (2012)
AbstractBiTeI has a layered and noncentrosymmetric structure where strong spin-orbit interaction leads to a giant Rashba spin splitting in the bulk bands. We present direct measurements of the bulk band structure obtained with soft x-ray angle-resolved photoemission (ARPES), revealing the three-dimensional Fermi surface. The observed spindle torus shape bears the potential for a topological transition in the bulk by hole doping. Moreover, the bulk electronic structure is clearly disentangled from the two-dimensional surface electronic structure by means of high-resolution and spin-resolved ARPES measurements in the ultraviolet regime. All findings are supported by ab initio calculations. © 2012 American Physical Society.
Publisher version (URL)http://dx.doi.org/10.1103/PhysRevLett.109.116403
Identifiersdoi: 10.1103/PhysRevLett.109.116403
issn: 0031-9007
e-issn: 1079-7114
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