(DE)LOCALIZATION OF NONEQUILIBRIUM ELECTRONS IN PB1-XSNXTE(IN) IN HIGH MAGNETIC-FIELDстатья
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Дата последнего поиска статьи во внешних источниках: 30 октября 2013 г.
Аннотация:We report on high-field (H < 38 T) magnetoresistance and Hall effect measurements of initially dielectric Pb0.75Sn0.25Te(In). The data taken at 4.2 K show a magnetoresistance increase in time (localization) for a relatively low concentration of nonequilibrium electrons n. For a higher level of photoexcitation the localization disappears, and the Hall effect measurements, on the contrary, reveal an increase of n with field. The localization is attributed to energy band modulation. The delocalization is discussed in terms of field-induced electron transitions between the metastable local and extended states.