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VOLUME 52 (1990) | ISSUE 5 | PAGE 925
Spectroscopic observation of Wigner crystallization of 2D electrons in a strong transverse magnetic field
A new line appears in the radiative-recombination spectra of 2D electrons in GaAs/AlGaAs heterostructures in a strong transverse magnetic field at low temperatures (T~ 0.4 K) upon the attainment of a critical filling factor vc = 0.28. The behavior of this line as a function of the magnetic field, the temperature, and the disorder is linked with a Wigner crystallization in a system of interacting electrons.