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Threshold features in transport through a 1D constriction | | Vadim Ponomarenko
; Naoto Nagaosa
; | | Date: |
27 Dec 1996 | | Subject: | Strongly Correlated Electrons | cond-mat.str-el | | Affiliation: | A.F.Ioffe PTI, St.Petersburg) and Naoto Nagaosa (Department of Applied Physics, University of Tokyo | | Abstract: | Suppression of electron current $ Delta I$ through a 1D channel of length $L$ connecting two Fermi liquid reservoirs is studied taking into account the Umklapp electron-electron interaction induced by a periodic potential. This interaction causes Hubbard gaps $E_H$ for $L o infty$. In the perturbative regime where $E_H ll v_c/L$ ($v_c:$ charge velocity), and for small deviations $delta n$ of the electron density from its commensurate values $- Delta I/V$ can diverge with some exponent as voltage or temperature $V,T$ decreases above $E_c=max(v_c/L,v_c delta n)$, while it goes to zero below $E_c$. This results in a nonmonotonous behavior of the conductance. | | Source: | arXiv, cond-mat/9701192 | | Services: | Forum | Review | PDF | Favorites | |
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