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

Abstract

The non-centrosymmetric 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 (STM), photoelectron spectroscopy (ARPES, XPS) and density functional theory (DFT) 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.

12 pages, 5 figures

References in corpus (17)

• Spintronics: Fundamentals and applications
• Giant Spin-splitting in the Bi/Ag(111) Surface Alloy
• Emergence of non-centrosymmetric topological insulating phase in BiTeI under pressure
• Origin of giant bulk Rashba splitting: Application to BiTeI
• Ideal two-dimensional electron systems with a giant Rashba-type spin splitting in real materials: surfaces of bismuth tellurohalides
• Fermi Level Tuning of Epitaxial Sb2Te3 Thin Films on Graphene by Regulating Intrinsic Defects and Substrate Transfer Doping
• Giant ambipolar Rashba effect in a semiconductor: BiTeI
• Strongly spin-orbit coupled two-dimensional electron gas emerging near the surface of polar semiconductors
• Surface and bulk Fermiology and band dispersion in non-centrosymmetric BiTeI
• Work functions of self-assembled monolayers on metal surfaces
• Quantum oscillations and optical conductivity in Rashba spin-splitting BiTeI
• Rashba split surface states in BiTeBr
• The momentum and photon energy dependence of the circular dichroic photoemission in the bulk Rashba semiconductors BiTeX (X = I, Br, Cl)
• Single Dirac-cone on the Cs-covered topological insulator surface Sb2Te3(0001)
• Atomic and Electronic Structure of a Rashba $p$-$n$ Junction at the BiTeI Surface
• Imaging ambipolar two-dimensional carriers induced by the spontaneous electric polarization of a polar semiconductor BiTeI
• Scanning tunneling microscopy study of the possible topological surface states in BiTeCl

Cited by in corpus (6)

• Pressure-induced topological phase transition in polar semiconductor BiTeBr
• Quantum spin Hall insulators in centrosymmetric thin films composed from topologically trivial BiTeI trilayers
• 2D and 3D topological phases in BiTe$X$ compounds
• In situ tuning of symmetry-breaking induced non-reciprocity in giant-Rashba semiconductor BiTeBr
• Topological Phase Diagram of BiTeX--Graphene Hybrid Structures
• Chromium chalcohalide Janus monolayer ferromagnets with perpendicular magnetic anisotropy and high Curie temperature