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Paper detail

Boundary-mediated electron-electron interactions in quantum point contacts

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.

preprint2008arXivOpen access
Vincent Thomas Francois RenardO. A. TkachenkoV. A. TkachenkoT. OtaN. KumadaJ. -C. PortalY. Hirayama
cond-mat.mes-hall
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Vincent Thomas Francois RenardO. A. TkachenkoV. A. TkachenkoT. OtaN. KumadaJ. -C. PortalY. Hirayama

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