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Infrared Optical Conductivity of Bulk Bi₂Te₂Se

Zhukova, Elena S. ; Zhang, Hongbin ; Martovitskiy, Victor P. ; Selivanov, Yurii G. ; Gorshunov, Boris P. ; Dressel, Martin (2023)
Infrared Optical Conductivity of Bulk Bi₂Te₂Se.
In: Crystals, 2020, 10 (7)
doi: 10.26083/tuprints-00017028
Article, Secondary publication, Publisher's Version

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Item Type: Article
Type of entry: Secondary publication
Title: Infrared Optical Conductivity of Bulk Bi₂Te₂Se
Language: English
Date: 20 November 2023
Place of Publication: Darmstadt
Year of primary publication: 2020
Place of primary publication: Basel
Publisher: MDPI
Journal or Publication Title: Crystals
Volume of the journal: 10
Issue Number: 7
Collation: 7 Seiten
DOI: 10.26083/tuprints-00017028
Corresponding Links:
Origin: Secondary publication DeepGreen

id- and near-infrared measurements reveal that the optical conductivity of the three-dimensional topological insulator, Bi₂Te₂Se, is dominated by bulk carriers and shows a linear-in-frequency increase at 0.5 to 0.8 eV. This linearity might be interpreted as a signature of three-dimensional (bulk) Dirac bands; however, band-structure calculations show that transitions between bands with complex dispersion contribute instead to the inter-band optical conductivity at these frequencies and, hence, the observed linearity is accidental. These results warn against the oversimplified interpretations of optical-conductivity measurements in different Dirac materials.

Uncontrolled Keywords: topological insulators, optical conductivity, Dirac materials
Status: Publisher's Version
URN: urn:nbn:de:tuda-tuprints-170287
Additional Information:

This article belongs to the Special Issue Advances in Topological Materials

Classification DDC: 500 Science and mathematics > 530 Physics
500 Science and mathematics > 540 Chemistry
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Theory of Magnetic Materials
Date Deposited: 20 Nov 2023 10:06
Last Modified: 23 Nov 2023 15:38
SWORD Depositor: Deep Green
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/17028
PPN: 513430903
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