Dephasing time of two-dimensional holes in GaAs open quantum dots: Magnetotransport measurements

S. Faniel, B. Hackens, A. Vlad, L. Moldovan, C. Gustin, B. Habib, S. Melinte, Mansour Shayegan, V. Bayot

Research output: Contribution to journalArticle

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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 τ together with an upper limit for the spin-orbit scattering time are extracted using the random matrix theory. The calculated τ 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.

Original languageEnglish (US)
Article number193310
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume75
Issue number19
DOIs
StatePublished - May 22 2007

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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