Magneto-optical evidence of the percolation nature of the metal-insulator transition in the two-dimensional electron system

Kukushkin, I. V. and Falko, Vladimir and Haug, R. J. and von Klitzing, K. and Eberl, K. (1996) Magneto-optical evidence of the percolation nature of the metal-insulator transition in the two-dimensional electron system. Physical review B, 53 (20). pp. 13260-13263. ISSN 0163-1829

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Abstract

We compare the results of the transport and time-resolved magnetoluminescence measurements in disordered two-dimensional (2D) electron systems in GaAs-AlxGa1-xAs heterostructures in the extreme quantum limit, particularly in the vicinity of the metal-insulator transition (MIT). At filling factors nu<1, the optical signal has two components: the single-rate exponentially decaying part attributed to a uniform liquid and a power-law long-living tail specific to a microscopically inhomogeneous state of electrons. We interpret this result as a separation of the 2D electron system into liquid and localized phases, especially because the MIT occurs strikingly close to those filling factors where the liquid occupies 1/2 of the sample area (the percolation threshold condition in two-component media).

Item Type:
Journal Article
Journal or Publication Title:
Physical review B
Additional Information:
© 1996 The American Physical Society
Uncontrolled Keywords:
/dk/atira/pure/researchoutput/libraryofcongress/qc
Subjects:
ID Code:
57075
Deposited By:
Deposited On:
05 Sep 2012 16:38
Refereed?:
Yes
Published?:
Published
Last Modified:
22 Oct 2020 01:52