Large transconductance oscillations in a single-well vertical Aharonov-Bohm interferometer

DOI to cite this document:: 10.5283/epub.11045

Piazza, Vincenzo ; Beltram, Fabio ; Wegscheider, Werner ; Liang, Chi-Te ; Pepper, M.

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Date of publication of this fulltext: 30 Nov 2009 13:26

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Abstract

Aharonov-Bohm (AB) interference is reported for the first time in the conductance of a vertical nanostructure based on a single GaAs/AlxGa1-xAs quantum well (QW). The two lowest subbands of the well are spatially separated by the Hartree barrier originating from electronic repulsion in the modulation-doped QW and provide AB two-path geometry. Split-gates control the in-plane electronic momentum ...