Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2001-01-12
Phys. Rev. Lett. 86, 4895 (2001)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
4 pages ReVTeX, 4 ps figures
Scientific paper
10.1103/PhysRevLett.86.4895
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.
Pepper Michael
Proskuryakov Y. Y.
Ritchie Dave A.
Safonov Sergey S.
Savchenko Alexander K.
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