Fakult?t für Physik, Albert-Ludwigs-Universit?t, 79104, Freiburg, Germany
Abstract:
We study nonlinear transport for two coupled one-dimensional quantum wires or carbon nanotubes described by Luttinger liquid
theory. Transport properties are shown to crucially depend on the contact length Lc. For a special interaction strength, the problem can be solved analytically for arbitrary Lc. For point-like contacts and strong interactions, a qualitatively different picture compared to a Fermi liquid emerges, characterized
by zero-bias anomalies and strong dependence on the applied cross voltage. In addition, pronounced Coulomb drag phenomena
are important for extended contacts.
Received 28 July 2000