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Nonmonotonic Temperature-dependent Resistance in Low Density 2D Hole Gases | | A. P. Mills
; Jr.
; A. P. Ramirez
; L. N. Pfeiffer
; K. W. West
; | | Date: |
13 May 1999 | | Subject: | Strongly Correlated Electrons | cond-mat.str-el | | Affiliation: | Bell Labs, Lucent Technologies | | Abstract: | 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<EF. The form of R_{el}(T) is independent of density, indicating a fundamental relationship between the low and high T scattering mechanisms in the metallic state. | | Source: | arXiv, cond-mat/9905176 | | Services: | Forum | Review | PDF | Favorites | |
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