Issue 46, 2021

Bulk band structure of Sb2Te3 determined by angle-resolved photoemission spectroscopy

Abstract

The bulk band structure of the topological insulator Sb2Te3 is investigated by angle-resolved photoemission spectroscopy. Of particular interest is the dispersion of the uppermost valence band with respect to the topological surface state Dirac point. The valence band maximum has been calculated to be either near the Brillouin zone centre or in a low-symmetry position in the [capital Gamma, Greek, macron][M with combining macron] azimuthal direction. In order to observe the full energy range of the valence band, the strongly p-doped crystals are counter-doped by surface alkali adsorption. The data show that the absolute valence band maximum is likely to be found at the bulk Γ point and predictions of a low-symmetry position with an energy higher than the surface Dirac point can be ruled out.

Graphical abstract: Bulk band structure of Sb2Te3 determined by angle-resolved photoemission spectroscopy

Article information

Article type
Paper
Submitted
02 Sep 2021
Accepted
12 Nov 2021
First published
12 Nov 2021

Phys. Chem. Chem. Phys., 2021,23, 26401-26406

Bulk band structure of Sb2Te3 determined by angle-resolved photoemission spectroscopy

H. E. Lund, K. Volckaert, P. Majchrzak, A. J. H. Jones, M. Bianchi, M. Bremholm and P. Hofmann, Phys. Chem. Chem. Phys., 2021, 23, 26401 DOI: 10.1039/D1CP04031F

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