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The quantum Hall effect in finite structures

✍ Scribed by F. Gagel; M. Schreiber; K. Maschke

Publisher
Elsevier Science
Year
1998
Tongue
English
Weight
257 KB
Volume
23
Category
Article
ISSN
0749-6036

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✦ Synopsis

Using the Landauer approach to electronic transport, we investigate numerically conductance and Hall conductance of a disordered and dissipative finite quantum wire. Ohmic voltage and current contacts are implemented by regions with gradually increasing dephasing rates. In this way, a self-stabilizing current distribution and well-defined Hall conductance plateaus are obtained, the accuracy of the latter depending on the spatial extension of the dephasing contact regions. We obtain the surprising result, that dephasing may improve conductance quantization by suppressing interference effects.

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