Electronic transport through a contact of a correlated quantum wire with leads of higher dimension
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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 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 ≅ ℏV F /eV T and at high temperatures T > T 0 ≅ eV T /k B the effect is destroyed by fluctuations.
KeywordsJETP Letter Quantum Wire Fermi Liquid Luttinger Liquid Bosonic Field
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