Classical-to-stochastic Coulomb blockade cross-over in aluminum arsenide wires

Details Classical-to-stochastic Coulomb blockade cross-over in aluminum arsenide wires Classical-to-stochastic Coulomb blockade cross-over in aluminum arsenide wires

2005-12-15

arxiv.org/abs/cond-mat/0512331v2

Phys. Rev. B 74, 193307 (2006)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

version 2: new figure 4, refined discussion

Scientific paper

10.1103/PhysRevB.74.193307

We report low-temperature differential conductance measurements in aluminum arsenide cleaved-edge overgrown quantum wires in the pinch-off regime. At zero source-drain bias we observe Coulomb blockade conductance resonances that become vanishingly small as the temperature is lowered below $250 {\rm mK}$. We show that this behavior can be interpreted as a classical-to-stochastic Coulomb blockade cross-over in a series of asymmetric quantum dots, and offer a quantitative analysis of the temperature-dependence of the resonances lineshape. The conductance behavior at large source-drain bias is suggestive of the charge density wave conduction expected for a chain of quantum dots.

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