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Termination-dependent surface properties in the giant-Rashba semiconductors BiTeX (X=Cl, Br, I)

AuthorsFiedler, Sebastian; Bathon, Thomas; Eremeev, S. V.; Tereshchenko, O. E.; Kokh, K. A.; Chulkov, Eugene V. CSIC ORCID; Sessi, Paolo; Bentmann, Hendrik; Bode, Matthias; Reinert, Friedrich
Issue Date2015
PublisherAmerican Physical Society
CitationPhysical Review B 92(23): 235430 (2015)
AbstractThe noncentrosymmetric semiconductors BiTeX(X=Cl,Br,I) show large Rashba-type spin-orbit splittings in their electronic structure making them candidate materials for spin-based electronics. However, BiTeI(0001) single-crystal surfaces usually consist of stacking-fault-induced domains of Te and I terminations implying a spatially inhomogeneous electronic structure. Here we combine scanning tunneling microscopy, photoelectron spectroscopy (ARPES, XPS), and density functional theory calculations to systematically investigate the structural and electronic properties of BiTeX(0001) surfaces. For X=Cl, Br we observe macroscopic single-terminated surfaces. We discuss chemical characteristics among the three materials in terms of bonding character, surface electronic structure, and surface morphology.
DescriptionUnder the terms of the Creative Commons Attribution License 3.0 (CC-BY).
Publisher version (URL)http://dx.doi.org/10.1103/PhysRevB.92.235430
Identifiersdoi: 10.1103/PhysRevB.92.235430
issn: 2469-9950
e-issn: 2469-9969
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