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25 April 2024

» arxiv » 0803.3503

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Boundary-mediated electron-electron interactions in quantum point contacts
Vincent Thomas Francois Renard ; O. A. Tkachenko ; V.A. Tkachenko ; T. Ota ; N. Kumada ; J.-C. Portal ; Y. Hirayama ;
Date:	25 Mar 2008
Abstract:	An unusual increase of the conductance with temperature is observed in clean quantum point contacts for conductances larger than 2e^2/h. At the same time a positive magnetoresistance arises at high temperatures. A model accounting for electron-electron interactions mediated by bound- aries (scattering on Friedel oscillations) qualitatively describes the observation. It is supported by numerical simulation at zero magnetic field.
Source:	arXiv, 0803.3503
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