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 nu > 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 nu = 1/3, the system undergoes metal-toinsulator transition, and in the insulating phase the dispersion becomes linear with evidence of an increased renormalized mass.
Optical probing of the metal-to-insulator transition in a two-dimensional high-mobility electron gas / Dionigi, Fabio; Rossella, Francesco; Bellani, Vittorio; M., Amado; E., Diez; K., Kowalik; G., Biasiol; L., Sorba. - In: NEW JOURNAL OF PHYSICS. - ISSN 1367-2630. - 13:(2011), pp. 063003-1-063003-8. [10.1088/1367-2630/13/6/063003]
Optical probing of the metal-to-insulator transition in a two-dimensional high-mobility electron gas
ROSSELLA, FRANCESCO;
2011
Abstract
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 nu > 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 nu = 1/3, the system undergoes metal-toinsulator transition, and in the insulating phase the dispersion becomes linear with evidence of an increased renormalized mass.File | Dimensione | Formato | |
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