Electronic transport through a contact of a correlated quantum wire with leads of higher dimension |
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Authors: | S N Artemenko P P Aseev and D S Shapiro |
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Institution: | 1.Kotel’nikov Institute for Radioengineering and Electronics,Russian Academy of Sciences,Moscow,Russia |
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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
$
\bar I
is accompanied by coherent oscillations of frequency f = $
\bar I
$
\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. |
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Keywords: | |
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