Haubold, Erik and Fedorov, Alexander and Pielnhofer, Florian and Rusinov, Igor P. and Menshchikova, Tatiana V. and Duppel, Viola and Friedrich, Daniel and Weihrich, Richard and Pfitzner, Arno and Zeugner, Alexander and Isaeva, Anna and Thirupathaiah, Setti and Kushnirenko, Yevhen and Rienks, Emile and Kim, Timur and Chulkov, Evgueni V. and Buechner, Bernd and Borisenko, Sergey (2019) Possible experimental realization of a basic Z(2) topological semimetal in GaGeTe. APL MATERIALS, 7 (12): 121106. ISSN 2166-532X,
Full text not available from this repository. (Request a copy)Abstract
We report experimental and theoretical evidence that GaGeTe is a basic Z(2) topological semimetal with three types of charge carriers: bulk-originated electrons and holes as well as surface state electrons. This electronic situation is qualitatively similar to the classic 3D topological insulator Bi2Se3, but important differences account for an unprecedented transport scenario in GaGeTe. High-resolution angle-resolved photoemission spectroscopy combined with advanced band structure calculations show a small indirect energy gap caused by a peculiar band inversion at the T-point of the Brillouin zone in GaGeTe. An energy overlap of the valence and conduction bands brings both electron and holelike carriers to the Fermi level, while the momentum gap between the corresponding dispersions remains finite. We argue that peculiarities of the electronic spectrum of GaGeTe have a fundamental importance for the physics of topological matter and may boost the material's application potential.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | BAND-STRUCTURE; SPECTRUM; GE; |
| Subjects: | 500 Science > 530 Physics 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Anorganische Chemie Chemistry and Pharmacy > Institut für Anorganische Chemie > Chair Prof. Dr. Arno Pfitzner Chemistry and Pharmacy > Institut für Anorganische Chemie > Arbeitskreis Dr. Richard Weihrich |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 20 Mar 2020 12:06 |
| Last Modified: | 20 Mar 2020 12:06 |
| URI: | https://pred.uni-regensburg.de/id/eprint/25724 |
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