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Pis'ma v Zh. Èksper. Teoret. Fiz., 2015, Volume 101, Issue 3, Pages 194–199 (Mi jetpl4544)  

This article is cited in 7 scientific papers (total in 7 papers)


Effect of exciton dragging by a surface acoustic wave

V. M. Kovalevab, A. V. Chaplikcb

a Novosibirsk State Technical University
b Rzhanov Institute of Semiconductor Physics, Siberian Branch of Russian Academy of Sciences, Novosibirsk
c Novosibirsk State University

Abstract: We present the theory of the effect of exciton dragging by a Rayleigh surface acoustic wave at temperatures above the condensation temperature of the exciton gas and at zero temperature, where the effects of the Bose–Einstein condensation of the exciton gas are most pronounced. The magnitude of the acoustic drag flux in the exciton gas at high temperatures has been calculated taking into account the exciton-exciton interaction. It has been shown that the drag flux at typical experimental parameters (at a given intensity of the surface acoustic wave (SAW)) is independent of the frequency of the acoustic wave, whereas the interaction between excitons leads to screening of the SAW-induced perturbation, which results in an exponentially fast decrease in the drag flux with an increase in the exciton density. At low temperatures, in the presence of a condensate, the drag flux of condensate particles exhibits a resonance character when the velocity of Bogoliubov excitations approaches the velocity of the acoustic wave and the magnitude of the flux is linear in the SAW frequency. The drag flux of the above-condensate particles has a threshold character: the above-condensate particles are dragged by the wave at a velocity of the acoustic wave higher than the bogolon velocity. The magnitude of the above-condensate flux is inversely proportional to the SAW frequency.


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English version:
Journal of Experimental and Theoretical Physics Letters, 2015, 101:3, 177–182

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Document Type: Article
Received: 09.12.2014

Citation: V. M. Kovalev, A. V. Chaplik, “Effect of exciton dragging by a surface acoustic wave”, Pis'ma v Zh. Èksper. Teoret. Fiz., 101:3 (2015), 194–199; JETP Letters, 101:3 (2015), 177–182

Citation in format AMSBIB
\by V.~M.~Kovalev, A.~V.~Chaplik
\paper Effect of exciton dragging by a surface acoustic wave
\jour Pis'ma v Zh. \`Eksper. Teoret. Fiz.
\yr 2015
\vol 101
\issue 3
\pages 194--199
\jour JETP Letters
\yr 2015
\vol 101
\issue 3
\pages 177--182

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    This publication is cited in the following articles:
    1. M. V. Boev, V. M. Kovalev, A. V. Chaplik, “Generation of sound by a two-dimensional gas of indirect dipolar excitons”, JETP Letters, 102:12 (2015), 807–810  mathnet  crossref  crossref  isi  elib
    2. M. V. Boev, V. M. Kovalev, A. V. Chaplik, “Acoustic-excitonic effects in a two-dimensional gas of dipolar excitons”, JETP Letters, 104:3 (2016), 204–211  mathnet  crossref  crossref  isi  elib
    3. Kovalev V.M. Chaplik A.V., “Acousto-exciton interaction in a gas of 2D indirect dipolar excitons in the presence of disorder”, J. Exp. Theor. Phys., 122:3 (2016), 499–508  crossref  isi  elib  scopus
    4. M. V. Boev, A. V. Chaplik, V. M. Kovalev, “Interaction of Rayleigh Waves With 2D Dipolar Exciton Gas: Impact of Bose–Einstein Condensation”, J. Phys. D-Appl. Phys., 50:48 (2017), 484002  crossref  isi  scopus
    5. M. V. Boev, V. M. Kovalev, “Coulomb drag of dipole excitons in a hybrid exciton-electron system”, JETP Letters, 107:10 (2018), 635–639  mathnet  crossref  crossref  isi
    6. M. V. Boev, V. M. Kovalev, I. G. Savenko, “Resonant photon drag of dipolar excitons”, JETP Letters, 107:12 (2018), 737–741  mathnet  crossref  crossref  isi
    7. Grasselli F., Bertoni A., Goldoni G., “Classical and Quantum Dynamics of Indirect Excitons Driven By Surface Acoustic Waves”, Phys. Rev. B, 98:16 (2018), 165407  crossref  isi  scopus
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