Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2001-11-30
Phys. Rev. B, 65 (2002) 115310
Physics
Condensed Matter
Strongly Correlated Electrons
Scientific paper
10.1103/PhysRevB.65.115310
An optical method is suggested to determine the concentration of two-dimensional electrons in modulation-doped quantum wells at low and moderate electron densities between 10^{9} and 2x10^{11} cm^{-2}. The method is based on an analysis of magneto-reflectivity spectra of charged excitons (trions). The circular polarization degree and the oscillator strength of the charged excitons contain information about the density and spin polarization of two-dimensional electron gas. The method is applied to CdTe/(Cd,Mg)Te and ZnSe/Zn,Mg)(S,Se) heterostructures.
Astakhov Georgy V.
Faschinger W.
Karczewski Grzegorz
Kochereshko V. P.
Kossut Jacek
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