Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
1999-05-12
Physics
Condensed Matter
Strongly Correlated Electrons
Scientific paper
10.1103/PhysRevLett.83.2805
The low temperature longitudinal resistance-per-square Rxx(T) in ungated GaAs/AlGaAs quantum wells of high peak hole mobility 1.7x10^6 cm^2/Vs is metallic for 2D hole density p as low as 3.8x10^9 cm-2. The electronic contribution to the resistance, R_{el}(T), is a nonmonotonic function of T, exhibiting thermal activation, R_{el}(T) ~ exp{-E_a/kT}, for kT<
Jr.
Mills Allen P.
Pfeiffer Loren N.
Ramirez Arthur P.
West Ken. W.
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