2012/07/31 by А. П. Дмитриев, A. P. Dmitriev, I. V. Gornyi +1 · 1 citation
Engineering · Physics and Astronomy · #Ballistic conduction #Condensed matter physics #Coulomb #Drag #Electron #Mechanics #Molecular Junctions and Nanostructures #Momentum (technical analysis) #Momentum transfer #Physics #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #Quantum mechanics #Scattering #cond-mat.mes-hall #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.86.245402
published as Phys. Rev. B 86, 245402 (2012) · 41 pages, 11 figures, more extended discussion, figures added
arxiv created 2012/11/01 · openalex publication_date 2012/12/03 · arxiv updated 2012/12/04 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We develop a kinetic equation description of Coulomb drag between ballistic one-dimensional electron systems, which enables us to demonstrate that equilibration processes between right- and left-moving electrons are crucially important for establishing dc drag. In one-dimensional geometry, this type of equilibration requires either backscattering near the Fermi level or scattering with small-momentum transfer near the bottom of the electron spectrum. Importantly, pairwise forward scattering in the vicinity of the Fermi surface alone is not sufficient to produce a nonzero dc drag resistivity \ensuremathρD, in contrast to a number of works that have studied Coulomb drag due to this mechanism of scattering before. We show that slow equilibration between two subsystems of electrons of opposite chirality, ``bottlenecked'' by inelastic collisions involving cold electrons near the bottom of the conduction band, leads to a strong suppression of Coulomb drag, which results in an activation dependence of \ensuremathρD on temperature, instead of the conventional power law. We demonstrate the emergence of a drag regime in which \ensuremathρD does not depend on the strength of interwire interactions, while depending strongly on the strength of interactions inside the wires.