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This article is cited in 4 scientific papers (total in 4 papers)
CONDENSED MATTER
Suppression of magneto-intersubband resistance oscillations by large-scale fluctuations of the intersubband energy splitting
A. A. Bykova, D. V. Nomokonova, A. V. Gorana, I. S. Strygina, A. K. Bakarova, S. Abedib, S. A. Vitkalovb a Rzhanov Institute of Semiconductor Physics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090 Russia
b Physics Department, City College of the City University of New York, NY 10031, USA
Abstract:
Low-temperature dependences of the amplitude of magneto-intersubband resistance oscillations ( $\Delta {{R}_{{{\text{MISO}}}}}$) on the magnetic field $B < 2$ T are studied in single GaAs quantum wells with the width ( ${{d}_{{{\text{SQW}}}}}$) from $22$ to $46$ nm and two occupied quantum confinement subbands ${{E}_{1}}$ and ${{E}_{2}}$. It is established that additional damping appears in dependences of $\Delta {{R}_{{{\text{MISO}}}}}$ on $1/B$ in the studied quantum wells, which is explained by the effect of large-scale fluctuations of the intersubband splitting ${{\Delta }_{{12}}} = {{E}_{2}} - {{E}_{1}}$ on the amplitude of oscillations $\Delta {{R}_{{{\text{MISO}}}}}$. It is found that the suppression of oscillations $\Delta {{R}_{{{\text{MISO}}}}}$ with the increase in $1/B$ is more efficient in “narrow” quantum wells. This experimental fact makes it possible to suppose that the main origin of fluctuations of ${{\Delta }_{{12}}}$ in the studied narrow quantum wells is large-scale fluctuations of the well width ${{d}_{{{\text{SQW}}}}}$. An expression taking into account the role of large-scale fluctuations of ${{\Delta }_{{12}}}$ in the damping of $\Delta {{R}_{{{\text{MISO}}}}}$ is obtained. The comparison of theory and experiment has made it possible to determine the average amplitude of fluctuations of the intersubband splitting in the studied GaAs quantum wells.
Received: 02.09.2021 Revised: 02.09.2021 Accepted: 09.09.2021
Citation:
A. A. Bykov, D. V. Nomokonov, A. V. Goran, I. S. Strygin, A. K. Bakarov, S. Abedi, S. A. Vitkalov, “Suppression of magneto-intersubband resistance oscillations by large-scale fluctuations of the intersubband energy splitting”, Pis'ma v Zh. Èksper. Teoret. Fiz., 114:7 (2021), 486–492; JETP Letters, 114:7 (2021), 423–428
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https://www.mathnet.ru/eng/jetpl6523 https://www.mathnet.ru/eng/jetpl/v114/i7/p486
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Abstract page: | 71 | References: | 14 | First page: | 7 |
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