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Quantum point contact: interplay between the diffraction and the electron-electron interaction

Keywords:

T.V. Krishtop, K.E. Nagaev


We consider a transmission of electrons through a two-dimensional ballistic point contact in the low-conductance regime below the 0.7-anomaly. The scattering of electrons by Friedel oscillations of charge density results in a contribution to the conductance proportional to the temperature. The sign of this linear term depends on the range of the electron-electron interaction.
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