Coulomb drag between one-dimensional conductors

Details Coulomb drag between one-dimensional conductors Coulomb drag between one-dimensional conductors

2000-03-08

arxiv.org/abs/cond-mat/0003118v2

Physics

Condensed Matter

5 twocolumn pages in RevTex, added 1 eps-Figure and calculation of trans-resistance

Scientific paper

10.1103/PhysRevLett.85.4928

We have analyzed Coulomb drag between currents of interacting electrons in two parallel one-dimensional conductors of finite length $L$ attached to external reservoirs. For strong coupling, the relative fluctuations of electron density in the conductors acquire energy gap $M$. At energies larger than $\Gamma = const \times v_- \exp (-LM/v_-)/L + \Gamma_{+}$, where $\Gamma_{+}$ is the impurity scattering rate, and for $L>v_-/M$, where $v_-$ is the fluctuation velocity, the gap leads to an ``ideal'' drag with almost equal currents in the conductors. At low energies the drag is suppressed by coherent instanton tunneling, and the zero-temperature transconductance vanishes, indicating the Fermi liquid behavior.

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