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

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 $L<L_0\simeq \hslash v_F/e{V}_T$ and at high temperatures $T>T_0\simeq e{V}_T/k_B$ the effect is destroyed by fluctuations.

10 pages, to be published in JETP Letters, vol. 91

References in corpus (2)

• Shot Noise in Mesoscopic Conductors
• Spin-charge separation and localization in one-dimension