Single particle excitations and interband recombination in very low density 2D electron gases

Bernard Jusserand (1) , M. Perrin , A. Lemaitre , J. Bloch

1 INSP - Institut des Nanosciences de Paris

We report on the controlled transfer of very low electron densities in a single GaAs quantum well from electron hole pairs photoexcited in neighboring narrow quantum wells. Single particle excitation Raman scattering line shapes are in perfect agreement with the Lindhard dielectric function for electron densities well below 10(10) cm(-2), a density where exchange-correlation is expected to play an essential role in the collective behavior of the electron gas.

Mots clés: electron gas; electronic Raman scattering; doped quantum wells; GaAs; Fermi edge singularity

Domaines: Matière Condensée [cond-mat]

Bernard Jusserand, M. Perrin, A. Lemaitre, J. Bloch. Single particle excitations and interband recombination in very low density 2D electron gases. 28th International Conference on the Physics of Semiconductors (ICPS-28), Jul 2006, Vienna, Unknown Region. pp.411-412. ⟨hal-01288170⟩