Dephasing time of two-dimensional holes in GaAs open quantum dots: Magnetotransport measurements.
(2007) Physical Review B, Condensed matter and materials physics — Vol. 75, n° 19, p. 193310 (2007)
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- 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 T below 500 mK, we observe signatures of coherent transport, namely, conductance fluctuations and weak antilocalization. From these effects, the hole dephasing time tau(phi) together with an upper limit for the spin-orbit scattering time are extracted using the random matrix theory. The calculated tau(phi) shows a T dependence close to T-2, and its absolute value is found to be approximately one order of magnitude smaller than that reported for electrons.
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Citations
Faniel, S., Hackens, B., Vlad, A., Moldovan, L., Gustin, C., Habib, B., Melinte, S., Shayegan, M., & Bayot, V. (2007). Dephasing time of two-dimensional holes in GaAs open quantum dots: Magnetotransport measurements. Physical Review B, Condensed matter and materials physics, 75(19), 193310. https://doi.org/10.1103/PhysRevB.75.193310 (Original work published 2007)