Journal
APPLIED PHYSICS LETTERS
Volume 90, Issue 11, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.2714094
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The authors have fabricated undoped p-channel GaAs/AlxGa1-xAs heterostructure field-effect transistors with nearly ideal drain current-voltage characteristics, using atomic-layer-deposited Al2O3 as the dielectric, and measured their transport properties. At 0.3 K, the densities and mobilities of the two dimensional holes can be tuned up to 2.9x10(11)/cm(2) and 6.4x10(5) cm(2)/V s, respectively. The variable density high mobility two-dimensional hole system provides a large parameter space for the study of two-dimensional physics. (c) 2007 American Institute of Physics.
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