Regensburg 2019 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 62: Poster Wednesday: Topology and Symmetry-Protected Materials

O 62.5: Poster

Mittwoch, 3. April 2019, 17:45–20:00, Poster B1

Bulk band structure of Sb₂Te₃ — •Henriette Elisabeth Lund¹, Ann Julie Utne Holt¹, Martin Bremholm², and Philip Hofmann¹ — ¹Department of Physics and Astronomy, Interdisciplinary Nanoscience Center (iNANO), Aarhus University, 8000 Aarhus C, Denmark — ²Department of Chemistry and iNANO, Aarhus University, 8000 Aarhus C, Denmark

Sb₂Te₃ belongs to the class of materials known as topological insulators. The surface electronic structure of the material has been investigated with both angle-resolved photoemission spectroscopy (ARPES) and spin-resolved ARPES, but little is known about the bulk electronic structure of the material.

In the present study, the bulk and surface electronic structure of Sb₂Te₃ is investigated by means of ARPES performed at the ASTRID 2 synchrotron radiation facility in Aarhus, Denmark. The ARPES experiments reveal the presence of both two-dimensional and three-dimensional states in the band structure. The three-dimensional band structure is determined along high-symmetry directions in the Brillouin zone and compared to published band structure calculations.