Negative Coulomb Drag in a One-Dimensional Wire

See allHide authors and affiliations

Science  14 Jul 2006:
Vol. 313, Issue 5784, pp. 204-207
DOI: 10.1126/science.1126601

You are currently viewing the abstract.

View Full Text


We observed negative Coulomb drag for parallel coupled quantum wires, in which electrons flow in the opposite directions between the wires. This only occurred under the conditions of strong correlation in the wires, that is, low density, high magnetic field, and low temperature, and cannot be addressed by a standard theory of momentum transfer. We propose a Coulomb drag model in which formation of a Wigner crystal state in the drag wire and a particle-like state in the drive wire is taken into account.

View Full Text