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Magnetic-field asymmetry of nonlinear mesoscopic transport

Sanchez, David A.
Published in Physical Review Letters. 2004, vol. 93, no. 10, p. 106802
Abstract We investigate departures of the Onsager relations in the nonlinear regime of electronic transport through mesoscopic systems. We show that the nonlinear current--voltage characteristic is not an even function of the magnetic field due only to the magnetic-field dependence of the screening potential within the conductor. We illustrate this result for two types of conductors: A quantum Hall bar with an antidot and a chaotic cavity connected to quantum point contacts. For the chaotic cavity we obtain through random matrix theory an asymmetry in the fluctuations of the nonlinear conductance that vanishes rapidly with the size of the contacts.
Keywords Quantum dotsMesoscopic systemsScreeningOnsager relationsMagnetic field effectsNon linear effectAsymmetryTransport processes
PMID: 15447435
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SANCHEZ, David A., BUTTIKER, Markus. Magnetic-field asymmetry of nonlinear mesoscopic transport. In: Physical Review Letters, 2004, vol. 93, n° 10, p. 106802. doi: 10.1103/PhysRevLett.93.106802 https://archive-ouverte.unige.ch/unige:4196

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Deposited on : 2009-11-30

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