Boundary-mediated electron-electron interactions in quantum point contacts.
نویسندگان
چکیده
An unusual increase of the conductance with temperature is observed in clean quantum point contacts for conductances larger than 2(e2/h). At the same time, a positive magnetoresistance arises at high temperatures. A model accounting for electron-electron interactions mediated by boundaries (scattering on Friedel oscillations) qualitatively describes the observation. It is supported by a numerical simulation at zero magnetic field.
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ورودعنوان ژورنال:
- Physical review letters
دوره 100 18 شماره
صفحات -
تاریخ انتشار 2008