Speaker
Dr
Thiago Peixoto
(Universität Würzburg, Fakultät f. Physik u- Astronomie, Lstl. f. Experimentelle Physik VII)
Description
We investigated the electronic structure of (BiSbV)2Te3 thin films by means of X-ray photoemission (XPS) and absorption (XAS) spectroscopy. This system is a three-dimensional magnetic topological insulator, recently reported
as an anomalous quantum Hall system. The films were epitaxially
grown on a Si(111) crystal and covered by a Se cap to avoid
contamination during exposition to air. After thermally desorbing the
Se cap, the core-level lines of the constituent elements and the V L2,3
absorption edges were measured for different V concentrations (0, 2
and 4 at.%). Our data evidence the incorporation of Se atoms in the
film. By means of resonant photoemission we identify the signature of
the V 3d states at the Fermi level, which may contribute to the exotic
transport properties of the system. We show that our techniques are well suited for
the study of the electronic properties of this novel class of materials.
Primary author
Dr
Thiago Peixoto
(Universität Würzburg, Fakultät f. Physik u- Astronomie, Lstl. f. Experimentelle Physik VII)
Co-authors
Dr
Charles Gould
(Universität Würzburg, Fakultät f. Physik u- Astronomie, Lstl. f. Experimentelle Physik III)
Mr
Christoph Seibel
(Universität Würzburg, Fakultät f. Physik u- Astronomie, Lstl. f. Experimentelle Physik VII)
Prof.
Friedrich Reinert
(Universität Würzburg, Fakultät f. Physik u- Astronomie, Lstl. f. Experimentelle Physik VII)
Dr
Hendrik Bentmann
(Universität Würzburg, Fakultät f. Physik u- Astronomie, Lstl. f. Experimentelle Physik VII)
Ms
Henriette Maass
(Universität Würzburg, Fakultät f. Physik u- Astronomie, Lstl. f. Experimentelle Physik VII)
Dr
Karl Brunner
(Universität Würzburg, Fakultät f. Physik u- Astronomie, Lstl. f. Experimentelle Physik III)
Prof.
Laurens Molenkamp
(Universität Würzburg, Fakultät f. Physik u- Astronomie, Lstl. f. Experimentelle Physik III)
Mr
Martin Winnerlein
(Universität Würzburg, Fakultät f. Physik u- Astronomie, Lstl. f. Experimentelle Physik III)
Mr
Mohammed Al-Baidhani
(Universität Würzburg, Fakultät f. Physik u- Astronomie, Lstl. f. Experimentelle Physik VII)
Mr
Stefan Grauer
(Universität Würzburg, Fakultät f. Physik u- Astronomie, Lstl. f. Experimentelle Physik III)
Mr
Steffen Schreyeck
(Universität Würzburg, Fakultät f. Physik u- Astronomie, Lstl. f. Experimentelle Physik III)
