Quantum Lifetime of Two-Dimensional Holes

Details Quantum Lifetime of Two-Dimensional Holes Quantum Lifetime of Two-Dimensional Holes

2007-05-28

arxiv.org/abs/0705.4072v2

Solid State Communications 143, 365 (2007)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 4 figures. Published version

Scientific paper

10.1016/j.ssc.2007.06.010

The quantum lifetime of two-dimensional holes in a GaAs/AlGaAs double quantum well is determined via tunneling spectroscopy. At low temperatures the lifetime is limited by impurity scattering but at higher temperatures hole-hole Coulomb scattering dominates. Our results are consistent with Fermi liquid theory, at least up to r_s = 11. At the highest temperatures the measured width of the hole spectral function becomes comparable to the Fermi energy. A new, tunneling-spectroscopic, method for determining the in-plane effective mass of the holes is also demonstrated.

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