Surfaces and Interfaces, volume 36, pages 102516
Occupancy of lattice positions probed by X-ray photoelectron diffraction: A case study of tetradymite topological insulators
Vladimirova Nadezhda V
1, 2, 3
,
Frolov Alexander S
1, 2, 3
,
Sánchez-Barriga Jaime
4
,
Ingham Clark Oliver D.
4
,
Matsui Fumihiko
5
,
Usachov D. Yu.
1, 6
,
Callaert Carolien
8
,
Hadermann Joke
8
,
Tamm Marina E.
3
,
Yashina Lada V.
2, 3
2
4
Helmholtz-Zentrum Berlin für Materialien und Energie, Elektronenspeicherring BESSY II, Albert-Einstein-Str. 15, Berlin 12489, Germany
|
5
Institute for Molecular Science, Okazaki 444-8585 Japan
|
7
Publication type: Journal Article
Publication date: 2023-02-01
Journal:
Surfaces and Interfaces
Quartile SCImago
Q1
Quartile WOS
Q1
Impact factor: 6.2
ISSN: 24680230
Surfaces, Coatings and Films
General Chemistry
General Physics and Astronomy
Condensed Matter Physics
Surfaces and Interfaces
Abstract
Occupancy of different structural positions in a crystal lattice often seems to play a key role in material properties. Several experimental techniques have been developed to uncover this issue, all of them being mostly bulk sensitive. However, many materials including topological insulators (TIs), which are among the most intriguing modern materials, are intended to be used in devices as thin films, for which the sublattice occupancy may differ from the bulk. One of the possible approaches to occupancy analysis is X-ray Photoelectron Diffraction (XPD), a structural method in surface science with chemical sensitivity. We applied this method in a case study of Sb2(Te1-xSex)3 mixed crystals, which belong to prototypical TIs. We used high-angle annular dark field (HAADF) scanning transmission electron microscopy (STEM) as a reference method to verify our analysis. We revealed that the XPD data for vacuum cleaved bulk crystals are in excellent agreement with the reference ones. Also, we demonstrate that the anion occupancy near a naturally formed surface can be rather different from that of the bulk. The present results are relevant for a wide range of compositions where the system remains a topological phase, as we ultimately show by probing the transiently occupied topological surface state above the Fermi level by ultrafast photoemission.
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Vladimirova N. V. et al. Occupancy of lattice positions probed by X-ray photoelectron diffraction: A case study of tetradymite topological insulators // Surfaces and Interfaces. 2023. Vol. 36. p. 102516.
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Vladimirova N. V., Frolov A. S., Sánchez-Barriga J., Ingham Clark O. D., Matsui F., Usachov D. Y., Muntwiler M., Callaert C., Hadermann J., Neudachina V. S., Tamm M. E., Yashina L. V. Occupancy of lattice positions probed by X-ray photoelectron diffraction: A case study of tetradymite topological insulators // Surfaces and Interfaces. 2023. Vol. 36. p. 102516.
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TY - JOUR
DO - 10.1016/j.surfin.2022.102516
UR - https://doi.org/10.1016%2Fj.surfin.2022.102516
TI - Occupancy of lattice positions probed by X-ray photoelectron diffraction: A case study of tetradymite topological insulators
T2 - Surfaces and Interfaces
AU - Vladimirova, Nadezhda V
AU - Frolov, Alexander S
AU - Sánchez-Barriga, Jaime
AU - Ingham Clark, Oliver D.
AU - Matsui, Fumihiko
AU - Usachov, D. Yu.
AU - Muntwiler, Matthias
AU - Callaert, Carolien
AU - Hadermann, Joke
AU - Neudachina, Vera S
AU - Tamm, Marina E.
AU - Yashina, Lada V.
PY - 2023
DA - 2023/02/01 00:00:00
PB - Elsevier
SP - 102516
VL - 36
SN - 2468-0230
ER -
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@article{2023_Vladimirova,
author = {Nadezhda V Vladimirova and Alexander S Frolov and Jaime Sánchez-Barriga and Oliver D. Ingham Clark and Fumihiko Matsui and D. Yu. Usachov and Matthias Muntwiler and Carolien Callaert and Joke Hadermann and Vera S Neudachina and Marina E. Tamm and Lada V. Yashina},
title = {Occupancy of lattice positions probed by X-ray photoelectron diffraction: A case study of tetradymite topological insulators},
journal = {Surfaces and Interfaces},
year = {2023},
volume = {36},
publisher = {Elsevier},
month = {feb},
url = {https://doi.org/10.1016%2Fj.surfin.2022.102516},
pages = {102516},
doi = {10.1016/j.surfin.2022.102516}
}