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Pis'ma v Zh. Èksper. Teoret. Fiz., 2002, Volume 76, Issue 6, Pages 420–424 (Mi jetpl2928)  

This article is cited in 1 scientific paper (total in 1 paper)

CONDENSED MATTER

Manifestation of coulomb gap in two-dimensional $p$-GaAs-AlGaAs structures with filled upper Hubbard band

N. V. Agrinskaya, V. I. Kozub, V. M. Ustinov, A. V. Chernyaev, D. V. Shamshur

Ioffe Physico-Technical Institute, Russian Academy of Sciences, St. Petersburg

Abstract: The transport properties of multilayer GaAs/AlGaAs structures doped modulationally with Be so as to fill, in equilibrium, the states of upper Hubbard band (A$^+$-centers) with holes were studied. For the concentration of dopants on the order of $5\cdot10^{11} $cm$^{-2}$, the hopping conduction over the states in the Coulomb gap was observed in the temperature range 0.44 K. The characteristic temperature ($T_1$) was determined from the temperature dependence of conductance and found to be appreciably lower (by 30 times) than its theoretically predicted value. This discrepancy is assumed to be due to the correlated hopping effect. In the temperature dependence of magnetoresistance, the suppression of negative magnetoresistance was observed with lowering temperature. This is explained by the weakness of underbarrier scattering in the transport via the upper Hubbard band.

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English version:
Journal of Experimental and Theoretical Physics Letters, 2002, 76:6, 360–364

PACS: 73.21.-b
Received: 24.07.2002

Citation: N. V. Agrinskaya, V. I. Kozub, V. M. Ustinov, A. V. Chernyaev, D. V. Shamshur, “Manifestation of coulomb gap in two-dimensional $p$-GaAs-AlGaAs structures with filled upper Hubbard band”, Pis'ma v Zh. Èksper. Teoret. Fiz., 76:6 (2002), 420–424; JETP Letters, 76:6 (2002), 360–364

Citation in format AMSBIB
\Bibitem{AgrKozUst02}
\by N.~V.~Agrinskaya, V.~I.~Kozub, V.~M.~Ustinov, A.~V.~Chernyaev, D.~V.~Shamshur
\paper Manifestation of coulomb gap in two-dimensional $p$-GaAs-AlGaAs structures with filled upper Hubbard band
\jour Pis'ma v Zh. \`Eksper. Teoret. Fiz.
\yr 2002
\vol 76
\issue 6
\pages 420--424
\mathnet{http://mi.mathnet.ru/jetpl2928}
\transl
\jour JETP Letters
\yr 2002
\vol 76
\issue 6
\pages 360--364
\crossref{https://doi.org/10.1134/1.1525037}
\scopus{http://www.scopus.com/record/display.url?origin=inward&eid=2-s2.0-0039484296}


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    This publication is cited in the following articles:
    1. Petrov P.V., Ivanov Yu.L., Averkiev N.S., Low Temp. Phys., 41:2 (2015), 90–97  crossref  isi  scopus
  •       Pis'ma v Zhurnal ksperimental'noi i Teoreticheskoi Fiziki
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