Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2005-12-28
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
Accepted for publication in International Journal of Nanoscience
Scientific paper
The resistivity (R) of low mobility dilute 2D-electron gas in a n-InGaAs/GaAs double quantum well (DQW) exhibits the monotonic 'insulating-like' temperature dependence (dR/dT < 0) at T = 1.8 -- 70K in zero magnetic field. This temperature interval corresponds to a ballistic regime (kTtau/hbar > 0.1 -- 3.5) for our samples, and the electron density is on a 'insulating' side of the so-called B = 0 2D metal--insulator transition. We show that the observed localization and Landau quantization is due to the Sigma_xy(T)anomalous T-dependence.
Arapov Yu. G.
Gudina S. V.
Harus G. I.
Neverov V. N.
Podgornyh S. M.
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