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Unconventional Metallicity and Giant Thermopower in a Strongly Interacting Two Dimensional Electron System
Vijay Narayan, Srijit Goswami, Michael Pepper +6
We present thermal and electrical transport measurements of low-density (10 m), mesoscopic two-dimensional electron systems (2DESs) in GaAs/AlGaAs heterostructures at…
Possible effect of collective modes in zero magnetic field transport in an electron-hole bilayer
A. F. Croxall, K. Das Gupta, C. A. Nicoll +4
We report single layer resistivities of 2-dimensional electron and hole gases in an electron-hole bilayer with a 10nm barrier. In a regime where the interlayer interaction is stron…
Re-entrant insulator-metal-insulator transition at B=0 in a two dimensional hole gas
A. R. Hamilton, M. Y. Simmons, M. Pepper +3
We report the observation of a re-entrant insulator--metal--insulator transition at B=0 in a two dimensional (2D) hole gas in GaAs at temperatures down to 30mK. At the lowest carri…
Metal-insulator transition at B=0 in an ultra-low density () two dimensional GaAs/AlGaAs hole gas
M. Y. Simmons, A. R. Hamilton, T. G. Griffiths +3
We have observed a metal-insulator transition in an ultra-low density two dimensional hole gas formed in a high quality GaAs-AlGaAs heterostructure at B=0. At the highest carrier d…