Magnetotransport in variable-coupling one-dimensional ballistic constrictions

DOI zum Zitieren dieses Dokuments:: 10.5283/epub.11316

Roddaro, Stefano ; Piazza, Vincenzo ; Beltram, Fabio ; Wegscheider, Werner ; Liang, Chi-Te ; Pepper, Michael

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Veröffentlichungsdatum dieses Volltextes: 07 Dez 2009 13:22

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Zusammenfassung

A scheme to produce closely spaced high-quality one-dimensional electronic channels is presented. It is based on standard nanolithography fabrication applied to a single, wide quantum well AlGaAs/GaAs heterostructure where the spatial separation of the wire modes is given by Coulomb repulsion. The lack of a composition-induced barrier in the double layer leads to electron mobility of 5×106 cm2/Vs ...