Galeeva, Alexandra V. and Artamkin, Alexey I. and Kazakov, Alexey S. and Danilov, Sergey N. and Dvoretskiy, Sergey A. and Mikhailov, Nikolay N. and Ryabova, Ludmila I. and Khokhlov, Dmitry R. (2018) Non-equilibrium electron transport induced by terahertz radiation in the topological and trivial phases of Hg1-xCdxTe. BEILSTEIN JOURNAL OF NANOTECHNOLOGY, 9. pp. 1035-1039. ISSN 2190-4286,
Full text not available from this repository. (Request a copy)Abstract
Terahertz photoconductivity in heterostructures based on n-type Hg1-xCdxTe epitaxial films both in the topological phase (x < 0.16, inverted band structure, zero band gap) and the trivial state (x > 0.16, normal band structure) has been studied. We show that both the positive photoresponse in films with x < 0.16 and the negative photoconductivity in samples with x > 0.16 have no low-energy threshold. The observed non-threshold positive photoconductivity is discussed in terms of a qualitative model that takes into account a 3D potential well and 2D topological Dirac states coexisting in a smooth topological heterojunction.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | HGTE QUANTUM-WELLS; ENERGY-GAP; TUNNELING IONIZATION; OPTICAL-ABSORPTION; ALLOY COMPOSITION; TEMPERATURE; TRANSITION; FIELDS; INSULATORS; FERMIONS; terahertz radiation; topological insulator; photoconductivity |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics > Professor Ganichev > Group Sergey Ganichev |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 11 Mar 2020 12:53 |
| Last Modified: | 11 Mar 2020 12:53 |
| URI: | https://pred.uni-regensburg.de/id/eprint/14870 |
Actions (login required)
 |
View Item |
