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Fermi-liquid behaviour of the low-density 2D hole gas in GaAs/AlGaAs heterostructure at large values of r_s | | Y.Y. Proskuryakov
; A.K. Savchenko
; S.S. Safonov
; M. Pepper
; M.Y. Simmons
; D.A. Ritchie
; | | Date: |
12 Dec 2000 | | Journal: | Phys. Rev. Lett. 86, 4895 (2001) | | Subject: | Mesoscopic Systems and Quantum Hall Effect; Strongly Correlated Electrons | cond-mat.mes-hall cond-mat.str-el | | Affiliation: | University of Exeter, UK), M. Pepper, M.Y. Simmons, D.A. Ritchie (University of Cambridge, UK | | Abstract: | We examine the validity of the Fermi-liquid description of the dilute 2D hole gas in the crossover from ’metallic’-to-’insulating’ behaviour of R(T).It has been established that, at r_s as large as 29, negative magnetoresistance does exist and is well described by weak localisation. The dephasing time extracted from the magnetoresistance is dominated by the T^2 -term due to Landau scattering in the clean limit. The effect of hole-hole interactions, however, is suppressed when compared with the theory for small r_s. | | Source: | arXiv, cond-mat/0101195 | | Services: | Forum | Review | PDF | Favorites | |
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