Optical probing of the metal-to-insulator transition in a two-dimensional high-mobility electron gas

Details Optical probing of the metal-to-insulator transition in a two-dimensional high-mobility electron gas Optical probing of the metal-to-insulator transition in a two-dimensional high-mobility electron gas

Jun 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011njph...13f3003d&link_type=abstract

New Journal of Physics, Volume 13, Issue 6, pp. 063003 (2011).

Physics

Scientific paper

We study the quantum Hall liquid and the metal-insulator transition in a high-mobility two-dimensional electron gas, by means of photoluminescence and magnetotransport measurements. In the integer and fractional regime at ν>1/3, by analyzing the emission energy dispersion we probe the magneto-Coulomb screening and the hidden symmetry of the electron liquid. In the fractional regime above ν=1/3, the system undergoes metal-to-insulator transition, and in the insulating phase the dispersion becomes linear with evidence of an increased renormalized mass.

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