Regensburg 2016 – wissenschaftliches Programm
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MM: Fachverband Metall- und Materialphysik
MM 7: Transport I: Electronic and thermal transport
MM 7.1: Vortrag
Montag, 7. März 2016, 11:30–11:45, H53
Non-linear conductance in mesoscopic weakly disordered wires - Interaction and magnetic field asymmetry — Christophe Texier1,2 and •Johannes Mitscherling1,3 — 1LPTMS, CNRS, Univ. Paris-Sud, Université Paris-Saclay, 91405 Orsay, France — 2Laboratoire de Physique des Solides, CNRS, Univ. Paris-Sud, Université Paris-Saclay, 91405 Orsay, France — 3Institute for Advanced Simulation, Forschungszentrum Jülich, 52428 Jülich, Germany
Whereas it is well known that the linear conductance of a two-terminal device is symmetric with respect to magnetic field reversal, the electronic interaction causes an asymmetry of the non-linear conductance G∼∂2I/∂ V2|V=0, which can thus be used as a probe of interaction as it was proposed in quantum dots in the ergodic regime [1,2].
We study the non-linear transport in weakly disordered metallic wires in the diffusive regime [3]. The analysis is based on the scattering approach including the effect of electronic interaction (screening) proposed by Büttiker. The dependence of the non-linear conductance in the phase coherence length is determined. The role of thermal fluctuations is also considered.
[1] D. Sánchez and M. Büttiker, Phys. Rev. Lett. 93, 106802 (2004)
[2] B. Spivak and A. Zyuzin, Phys. Rev. Lett. 93, 226801 (2004)
[3] C. Texier and J. Mitscherling, arXiv:1510.02214 (2015)