Quantum lifetime of two-dimensional holes

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 the Fermi liquid theory, at least up to rs = 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. © 2007 Elsevier Ltd. All rights reserved.

About this item

Creator
J. P. Eisenstein
D. Syphers
L. N. Pfeiffer
K. W. West
Date
2007-08-01
Bowdoin Department or Program
Physics and Astronomy
Subject
D. Holes
D. Quantum lifetime
D. Tunneling
Access
Open access

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