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Pis'ma v Zhurnal Èksperimental'noi i Teoreticheskoi Fiziki, 2021, Volume 114, Issue 2, Pages 108–113
DOI: https://doi.org/10.31857/S123456782114010X (Mi jetpl6475) 		 
This article is cited in 2 scientific papers (total in 2 papers)

CONDENSED MATTER

Low-frequency microwave response of a quantum point contact

V. A. Tkachenkoab, A. S. Yaroshevicha, Z. D. Kvonba, O. A. Tkachenkoa, E. E. Rodyakinaba, A. V. Latyshevba

a Rzhanov Institute of Semiconductor Physics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090 Russia
b Novosibirsk State University, Novosibirsk, 630090 Russia
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DOI: https://doi.org/10.31857/S123456782114010X
Abstract: The low-frequency microwave photoconductance of a short (100 nm) quantum point contact based on a high-mobility two-dimensional electron gas in the frequency range of 2–3 GHz is investigated for the first time. The giant photoconductance in the tunneling regime and the negative photoconductance in the open regime are observed. It is shown by numerical simulations that such response to microwave irradiation is caused by the forced oscillations of the saddle-point potential in the quantum point contact and of the probe voltage applied to the contact.
Funding agency Grant number
Russian Foundation for Basic Research 20-02-00385
Ministry of Science and Higher Education of the Russian Federation
This study was supported by the Russian Foundation for Basic Research (project no. 20-02-00385) and the Ministry of Science and Higher Education of the Russian Federation (state assignment for the Rzhanov Institute of Semiconductor Physics, Siberian Branch, Russian Academy of Sciences).
Received: 23.06.2021
Revised: 23.06.2021
Accepted: 24.06.2021
English version:
Journal of Experimental and Theoretical Physics Letters, 2021, Volume 114, Issue 2, Pages 110–115
DOI: https://doi.org/10.1134/S0021364021140101
Bibliographic databases:
Document Type: Article
Language: Russian
Citation: V. A. Tkachenko, A. S. Yaroshevich, Z. D. Kvon, O. A. Tkachenko, E. E. Rodyakina, A. V. Latyshev, “Low-frequency microwave response of a quantum point contact”, Pis'ma v Zh. Èksper. Teoret. Fiz., 114:2 (2021), 108–113; JETP Letters, 114:2 (2021), 110–115
Citation in format AMSBIB
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\vol 114
\issue 2
\pages 108--113
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    • This publication is cited in the following 2 articles:
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