Electronic transport through a contact of a correlated quantum wire with leads of higher dimension
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- Artemenko, S.N., Aseev, P.P. & Shapiro, D.S. Jetp Lett. (2010) 91: 589. doi:10.1134/S002136401011010X
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We study theoretically electronic transport through a contact of a quantum wire with 2D or 3D leads and find that if the contact is not smooth and adiabatic then the conduction is strongly suppressed below a threshold voltage VT, while above VT the dc current \( \bar I \) is accompanied by coherent oscillations of frequency f = \( \bar I \)/e. The effect is related to interelectronic repulsion and interaction of dc current with the Friedel oscillations near a sharp contact. In short conducting channels of length L < L0 ≅ ℏVF/eVT and at high temperatures T > T0 ≅ eVT/kB the effect is destroyed by fluctuations.