Abstract
We report magnetotransport measurements of two-dimensional holes in open quantum dots, patterned as either a single dot or an array of dots, on a GaAs quantum well. For temperatures below , we observe signatures of coherent transport, namely, conductance fluctuations and weak antilocalization. From these effects, the hole dephasing time together with an upper limit for the spin-orbit scattering time are extracted using the random matrix theory. The calculated shows a dependence close to , and its absolute value is found to be approximately one order of magnitude smaller than that reported for electrons.
- Received 13 February 2007
DOI:https://doi.org/10.1103/PhysRevB.75.193310
©2007 American Physical Society