Hole transport in p-type GaAs quantum dots and point contacts

Details Hole transport in p-type GaAs quantum dots and point contacts Hole transport in p-type GaAs quantum dots and point contacts

2007-11-04

arxiv.org/abs/0711.0485v1

AIP Conf. Proc. 893, 777 (2007)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Proceedings of ICPS-28, Vienna 2006; 2 pages, 2 figures

Scientific paper

10.1063/1.2730121

Strong spin-orbit interaction characteristic for p-type GaAs systems, makes such systems promising for the realization of spintronic devices. Here we report on transport measurements in nanostructures fabricated on p-type, C-doped GaAs heterostructures by scanning probe oxidation lithography. We observe conductance quantization in a quantum point contact, as well as pronounced Coulomb resonances in two quantum dots with different geometries. Charging energies for both dots, extracted from Coulomb diamond measurements are in agreement with the lithographic dimensions of the dots. The absence of excited states in Coulomb diamond measurements indicates that the dots are in the multi-level transport regime.

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