Journal
PHYSICAL REVIEW LETTERS
Volume 100, Issue 18, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.100.186801
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An unusual increase of the conductance with temperature is observed in clean quantum point contacts for conductances larger than 2(e(2)/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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