Browsing by Author "Portal, J-C."

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Probing the coexistence of semiclassical transport and localization in a two-dimensional electron gas using microwave radiation
(2013-03-01)
Hsu, Chang-Shun
;
Kannan, E. S.
;
Portal, J-C.
;
Liang, C. -T.
;
Huang, C. F.
We have performed magnetoresistance measurements on a GaAs/AlGaAs two-dimensional electron gas under microwave heating. Both the magneto-oscillations and magnetoresistance minima are used as electron thermometers to determine the electron effective temperature T-e. When there is no clear cyclotron gap, it is found that T-e determined from these two methods can be substantially different such that we can still distinguish localized electrons from the semiclassical conducting ones. The almost constant T-e obtained from the magnetoresistance minima reveals the survived equivalence between different Landau-band tails under insufficient localization. (C) 2012 Elsevier Ltd. All rights reserved.