Coulomb drag between quantum wires with different electron densities

Details Coulomb drag between quantum wires with different electron densities Coulomb drag between quantum wires with different electron densities

2004-08-05

arxiv.org/abs/cond-mat/0408118v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

6 pages, 4 figures

Scientific paper

10.1103/PhysRevB.71.045321

We study the way back-scattering electron--electron interaction generates Coulomb drag between quantum wires with different densities. At low temperature $T$ the system can undergo a commensurate-- incommensurate transition as the potential difference $|W|$ between the two wires passes a critical value $\Delta$, and this transition is reflected in a marked change in the dependence of drag resistivity on $W$ and $T$. At high temperature a density difference between the wires suppresses Coulomb drag induced by back scattering, and we use the Tomonaga--Luttinger model to study this suppression in detail.

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