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arXiv · 1004.5493

Electronic transport through a contact of a correlated quantum wire with leads of higher dimension

S. N. Artemenko·P. P. Aseev·D. S. Shapiro
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Abstract

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 $V_T$, while above $V_T$ 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 $L < L_0 \simeq \hbar v_F/eV_T$ and at high temperatures $T > T_0 \simeq eV_T/k_B$ the effect is destroyed by fluctuations.

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S. N. Artemenko, P. P. Aseev, D. S. Shapiro. 2010-04-30. Electronic transport through a contact of a correlated quantum wire with leads of higher dimension. https://doi.org/10.1134/s002136401011010x

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