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Gauge Invariant Nonlinear Electric Transport in Mesoscopic Conductors

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Published in Europhysics Letters. 1996, vol. 35, no. 7, p. 523-528
Abstract We use the scattering approach to investigate the nonlinear current-voltage characteristic of mesoscopic conductors. We discuss the leading nonlinearity by taking into account the self-consistent nonequilibrium potential. We emphasize conservation of the overall charge and current which are connected to the invariance under a global voltage shift (gauge invariance). As examples, we discuss the rectification coefficient of a quantum point contact and the nonlinear current-voltage characteristic of a resonant level in a double barrier structure.
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CHRISTEN, Thomas, BUTTIKER, Markus. Gauge Invariant Nonlinear Electric Transport in Mesoscopic Conductors. In: Europhysics Letters, 1996, vol. 35, n° 7, p. 523-528. https://archive-ouverte.unige.ch/unige:4279

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Deposited on : 2009-11-30

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