TY - JOUR
T1 - Dephasing time of two-dimensional holes in GaAs open quantum dots
T2 - Magnetotransport measurements
AU - Faniel, S.
AU - Hackens, B.
AU - Vlad, A.
AU - Moldovan, L.
AU - Gustin, C.
AU - Habib, B.
AU - Melinte, S.
AU - Shayegan, M.
AU - Bayot, V.
PY - 2007/5/22
Y1 - 2007/5/22
N2 - 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.
AB - 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.
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U2 - 10.1103/PhysRevB.75.193310
DO - 10.1103/PhysRevB.75.193310
M3 - Article
AN - SCOPUS:34347345049
SN - 1098-0121
VL - 75
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 19
M1 - 193310
ER -