Electron transport in coupled chains of interacting fermions with impurities

Details Electron transport in coupled chains of interacting fermions with impurities Electron transport in coupled chains of interacting fermions with impurities

1997-08-20

arxiv.org/abs/cond-mat/9708152v1

Phys. Rev. Lett. 79 (97) 2297

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 2 figures, to be published in Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.79.2297

We study the low-temperature transport of a doped two-chain ladder system of interacting fermions in the presence of a barrier or of a low concentration of impurities. Above a certain value of the interaction, the conductance is suppressed, like for a single chain, despite the presence of dominant superconducting correlations. There is, however, a region of repulsive interaction where perfect transmission across the barrier occurs unlike the single-chain case. We provide a possible explanation for the temperature maximum of the resistivity in the normal state of \srca.

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