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Studies of the extreme quantum limit of 2D hole systems

✍ Scribed by B.L. Gallagher; P.J. Rodgers; C.J.G.M. Langerak; P.A. Crump; M. Henini; G. Hill; S.A.J. Wiegers; J.A.A.J. Perenboom; Y. Ponomarev; A. Usher

Publisher: Elsevier Science
Year: 1995
Tongue: English
Weight: 211 KB
Volume: 211
Category: Article
ISSN: 0921-4526
DOI: 10.1016/0921-4526(94)01082-c

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✦ Synopsis

We present electrical transport and photoluminecence results for high mobility p-type GaAs/(AIGa)As systems. We observe transitions into an insulating state characterized by an activation energy and a threshold electrical field at a (density-dependent) Landau level filling factor. A new line also appears in the photoluminescence spectr~ at filling factors close to those at which the insulating state occurs. All our observations are similar to those in high mobility 2D electron systems but a larger filling factors as would be expected for a Wigner solid stabilised by the larger Landau level mixing.

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