Nonlinear response of a clean one-dimensional wire

We study nonlinear transport in a clean one-dimensional wire fabricated by cleaved edge overgrowth in molecular beam epitaxy. At low electron densities, and with a large applied bias, we observe a feature in the differential conductance similar to the so-called "0.7 structure," found in qu...

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Bibliographic Details
Published in:Physical review letters 2004-01, Vol.92 (3), p.036805-036805, Article 036805
Main Authors: de Picciotto, R, Pfeiffer, L N, Baldwin, K W, West, K W
Format: Article
Language:English
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Summary:We study nonlinear transport in a clean one-dimensional wire fabricated by cleaved edge overgrowth in molecular beam epitaxy. At low electron densities, and with a large applied bias, we observe a feature in the differential conductance similar to the so-called "0.7 structure," found in quantum point contact devices. Using a simple model we suggest a link between this phenomenon, charge neutrality, and unidirectional dynamics in the wire.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.92.036805