AlAs cleaved-edge overgrown quantum wires near pinch-off reveal conductance resonances with an unconventional dependence on temperature T. The resonance areas decrease with reduced T consistent with classical Coulomb blockade (CB) in a single dot, but then become rapidly smaller below a crossover TX. Though resembling Luttinger liquid behavior below the crossover, the anomalous T dependence including the crossover fit quantitatively to a classical-to- stochastic CB transition, whereby stochastic multidot CB sets in at low temperatures. Conductance at finite bias resembles a depinned charge density wave as expected for a chain of disorder induced dots. These studies highlight the applicability of the Fermi liquid paradigm to the description of disordered heavy-mass quantum wires.
|Original language||English (US)|
|Journal||Physical Review B - Condensed Matter and Materials Physics|
|State||Published - Nov 15 2006|
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics