Optical probing of correlation driven liquid-to-insulator transition in 2D electron gas

Details Optical probing of correlation driven liquid-to-insulator transition in 2D electron gas Optical probing of correlation driven liquid-to-insulator transition in 2D electron gas

2010-07-17

arxiv.org/abs/1007.2936v2

Physics

Condensed Matter

Strongly Correlated Electrons

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 magneto-transport. In the integer and fractional regime at nu > 1/3, analyzing the emission energy dispersion we probe the magneto-Coulomb screening and the hidden symmetry of the electron liquid. In the fractional regime above above nu =1/3 the system undergoes the metal-to-insulator transition, and in the insulating phase the dispersion becomes linear with evidence of an increased renormalized mass.

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