Abstract
The mm-wave spectroscopy with high temporal resolution is used to measure the energy relaxation times τe of 2D electrons in GaAs/AlGaAs heterostructures in magnetic fields B=0–4 T under quasi-equilibrium conditions at T=4.2 K. With increasing B, a considerable increase in τe from 0.9 to 25 ns is observed. For high B and low values of the filling factor ν, the energy relaxation rate τ −1e oscillates. The depth of these oscillations and the positions of maxima depend on the filling factor ν. For ν>5, the relaxation rate τ −1e is maximum when the Fermi level lies in the region of the localized states between the Landau levels. For lower values of ν, the relaxation rate is maximum at half-integer values of τ −1e when the Fermi level is coincident with the Landau level. The characteristic features of the dependence τ −1e (B) are explained by different contributions of the intralevel and interlevel electron-phonon transitions to the process of the energy relaxation of 2D electrons.
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References
B. K. Ridley, Rep. Progr. Phys. 54, 169 (1991).
V. Karpus, Fiz. Tekh. Poluprovodn. 22, 439 (1988).
H. Sakaki, K. Hirakawa, J. Yoshino, et al., Surf. Sci. 142, 306 (1994); K. Hirakawa and H. Sakaki, Appl. Phys. Lett. 49, 889 (1986).
A. A. Verevkin, N. G. Ptitsina, G. M. Chulcova, et al., Phys. Rev. B 53, R7592 (1996); A. A. Verevkin, N. G. Ptitsina, G. M. Chulkova, et al., Pis’ma Zh. Éksp. Teor. Fiz. 61, 579 (1995) [JETP Lett. 61, 591 (1995)].
H. A. J. M. Reinen, T. T. J. M. Berendschot, R. J. H. Kappert, et al., Solid State Commun. 65, 1495 (1988).
G. A. Toombs, F. W. Sheard, D. Neilson, et al., Solid State Commun. 64, 577 (1987).
F. Dietzel, W. Dietsche, and K. Ploog, Phys. Rev. B 48, 4713 (1993).
K. Benedict, J. Phys. Condens. Matter 4, 4083 (1992).
A. J. Kent, R. E. Strickland, K. R. Stpickland, et al., Phys. Rev. B 54, 2019 (1996).
B. R. A. Neves, N. Mori, P. H. Beton, et al., Phys. Rev. B 52, 4666 (1995).
N. M. Grodnenskii, K. V. Starostin, and D. V. Galchenkov, Pis’ma Zh. Éksp. Teor. Fiz. 43, 54 (1986) [JETP Lett. 43, 70 (1986)].
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Translated from Pis’ma v Zhurnal Éksperimental’no\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l}\) i Teoretichesko\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l}\) Fiziki, Vol. 71, No. 1, 2000, pp. 47–52.
Original Russian Text Copyright © 2000 by Smirnov, Ptitsina, Vakhtomin, Verevkin, Gol’tsman, Gershenzon.
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Smirnov, K.V., Ptitsina, N.G., Vakhtomin, Y.B. et al. Energy relaxation of two-dimensional electrons in the quantum Hall effect regime. Jetp Lett. 71, 31–34 (2000). https://doi.org/10.1134/1.568271
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DOI: https://doi.org/10.1134/1.568271