Non-local terahertz photoconductivity in the topological phase of Hg(1−x)Cd(x)Te

We report on observation of strong non-local photoconducitivity induced by terahertz laser pulses in non-zero magnetic field in heterostructures based on Hg(1−x)Cd(x)Te films being in the topological phase. While the zero-field non-local photoconductivity is negligible, it is strongly enhanced in ma...

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Autores principales: Kazakov, A. S., Galeeva, A. V., Artamkin, A. I., Ikonnikov, A. V., Ryabova, L. I., Dvoretsky, S. A., Mikhailov, N. N., Bannikov, M. I., Danilov, S. N., Khokhlov, D. R.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2021
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7810835/
https://www.ncbi.nlm.nih.gov/pubmed/33452348
http://dx.doi.org/10.1038/s41598-021-81099-6
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author Kazakov, A. S.
Galeeva, A. V.
Artamkin, A. I.
Ikonnikov, A. V.
Ryabova, L. I.
Dvoretsky, S. A.
Mikhailov, N. N.
Bannikov, M. I.
Danilov, S. N.
Khokhlov, D. R.
author_facet Kazakov, A. S.
Galeeva, A. V.
Artamkin, A. I.
Ikonnikov, A. V.
Ryabova, L. I.
Dvoretsky, S. A.
Mikhailov, N. N.
Bannikov, M. I.
Danilov, S. N.
Khokhlov, D. R.
author_sort Kazakov, A. S.
collection PubMed
description We report on observation of strong non-local photoconducitivity induced by terahertz laser pulses in non-zero magnetic field in heterostructures based on Hg(1−x)Cd(x)Te films being in the topological phase. While the zero-field non-local photoconductivity is negligible, it is strongly enhanced in magnetic fields ~ 0.05 T resulting in appearance of an edge photocurrent that exceeds the respective dark signal by orders of magnitude. This photocurrent is chiral, and the chirality changes every time the magnetic field or the electric bias is reversed. Appearance of the non-local terahertz photoconductivity is attributed to features of the interface between the topological film and the trivial buffer.
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spelling pubmed-78108352021-01-21 Non-local terahertz photoconductivity in the topological phase of Hg(1−x)Cd(x)Te Kazakov, A. S. Galeeva, A. V. Artamkin, A. I. Ikonnikov, A. V. Ryabova, L. I. Dvoretsky, S. A. Mikhailov, N. N. Bannikov, M. I. Danilov, S. N. Khokhlov, D. R. Sci Rep Article We report on observation of strong non-local photoconducitivity induced by terahertz laser pulses in non-zero magnetic field in heterostructures based on Hg(1−x)Cd(x)Te films being in the topological phase. While the zero-field non-local photoconductivity is negligible, it is strongly enhanced in magnetic fields ~ 0.05 T resulting in appearance of an edge photocurrent that exceeds the respective dark signal by orders of magnitude. This photocurrent is chiral, and the chirality changes every time the magnetic field or the electric bias is reversed. Appearance of the non-local terahertz photoconductivity is attributed to features of the interface between the topological film and the trivial buffer. Nature Publishing Group UK 2021-01-15 /pmc/articles/PMC7810835/ /pubmed/33452348 http://dx.doi.org/10.1038/s41598-021-81099-6 Text en © The Author(s) 2021 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Kazakov, A. S.
Galeeva, A. V.
Artamkin, A. I.
Ikonnikov, A. V.
Ryabova, L. I.
Dvoretsky, S. A.
Mikhailov, N. N.
Bannikov, M. I.
Danilov, S. N.
Khokhlov, D. R.
Non-local terahertz photoconductivity in the topological phase of Hg(1−x)Cd(x)Te
title Non-local terahertz photoconductivity in the topological phase of Hg(1−x)Cd(x)Te
title_full Non-local terahertz photoconductivity in the topological phase of Hg(1−x)Cd(x)Te
title_fullStr Non-local terahertz photoconductivity in the topological phase of Hg(1−x)Cd(x)Te
title_full_unstemmed Non-local terahertz photoconductivity in the topological phase of Hg(1−x)Cd(x)Te
title_short Non-local terahertz photoconductivity in the topological phase of Hg(1−x)Cd(x)Te
title_sort non-local terahertz photoconductivity in the topological phase of hg(1−x)cd(x)te
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7810835/
https://www.ncbi.nlm.nih.gov/pubmed/33452348
http://dx.doi.org/10.1038/s41598-021-81099-6
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