Termination dependent topological surface states of the natural superlattice phase Bi${}_4$Se${}_3$

Abstract

We describe the topological surface states of Bi${}_4$Se${}_3$, a compound in the infinitely adaptive Bi${}_2$-Bi${}_2$Se${}_3$ natural superlattice phase series, determined by a combination of experimental and theoretical methods. Two observable cleavage surfaces, terminating at Bi or Se, are characterized by angle resolved photoelectron spectroscopy and scanning tunneling microscopy, and modeled by ab-initio density functional theory calculations. Topological surface states are observed on both surfaces, but with markedly different dispersions and Kramers point energies. Bi${}_4$Se${}_3$ therefore represents the only known compound with different topological states on differently terminated surfaces.

5 figures references added Published in PRB: http://link.aps.org/doi/10.1103/PhysRevB.88.081108

References in corpus (9)

• A topological Dirac insulator in a quantum spin Hall phase : Experimental observation of first strong topological insulator
• First direct observation of Spin-textures in Topological Insulators : Spin-resolved ARPES as a probe of topological quantum spin Hall effect and Berry's phase
• Topological Surface States Protected From Backscattering by Chiral Spin Texture
• Quantum Spin Hall Effect and Enhanced Magnetic Response by Spin-Orbit Coupling
• Direct Evidence for the Dirac-Cone Topological Surface States in Ternary Chalcogenide TlBiSe2
• Topological Surface States and Dirac point tuning in ternary Bi2Te2Se class of topological insulators
• The structures and thermoelectric properties of the infinitely adaptive series (Bi2)m(Bi2Te3)n
• Spin-orbit interaction effect in the electronic structure of \BiTe \ observed by angle-resolved photoemission spectroscopy
• Quasiparticle Dynamics in Reshaped Helical Dirac Cone of Topological Insulators

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