1. The 0.7 structure in cleaved edge overgrowth wires
- Author
-
K. W. Baldwin, L N Pfieffer, R de Picciotto, and K. W. West
- Subjects
Condensed matter physics ,Chemistry ,Transconductance ,Fermi level ,Conductance ,Charge density ,Fermi energy ,Condensed Matter::Mesoscopic Systems and Quantum Hall Effect ,Condensed Matter Physics ,Kinetic energy ,symbols.namesake ,Electrical resistivity and conductivity ,Ballistic conduction ,symbols ,General Materials Science - Abstract
We study the conductance through long and ultra-clean one-dimensional conductors and find a conductance anomaly at low charge densities—similar to the so-called 0.7 structure found in short constrictions. Our wires, afforded by the cleaved edge overgrowth technique, allow a quantitative study of this phenomenon in long wires. We find that this anomaly occurs whenever the kinetic energy provided to the carriers exceeds the Fermi energy. In this regime, the measured conductance is found to exceed the value naively expected from non-interacting models.
- Published
- 2008