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Alfred Jones

Bulk band structure of Sb2Te3determined by angle-resolved photoemission spectroscopy

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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 -M 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.

OriginalsprogEngelsk
TidsskriftPhysical Chemistry Chemical Physics
Vol/bind23
Nummer46
Sider (fra-til)26401-26406
Antal sider6
ISSN1463-9076
DOI
StatusUdgivet - dec. 2021

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