Single particle parameters of a spin polarized electron gas in CdMnTe quantum wells: Comparison between raman scattering and photoluminescence

C. Aku-Leh , Florent Perez (1) , Bernard Jusserand (1) , D. Richards , G. Karczewski

1 INSP - Institut des Nanosciences de Paris

We compare resonant Raman Scattering (RS) and Photoluminescence (PL) measurements on a spin polarized two-dimensional electron gas embedded in a CdMnTe quantum well. RS by single particle excitations furnishes the Fermi energy E-F, which is more than E-F extracted from PL. Spin-flip RS spectra at wavevector q similar to 0, show the one electron spin-flip energy, Z*. Magneto-PL spectra give only Z. If we neglect mass renormalization, the spin polarization degree, C obtained from the PL lineshape is different from those derived from spin-flip RS. We attribute the discrepancies in E-F and zeta to the renormalized mass.

Mots clés: optical properties; spin-polarized electron gas; Zeeman splitting; quantum well

Domaines: Matière Condensée [cond-mat]

C. Aku-Leh, Florent Perez, Bernard Jusserand, D. Richards, G. Karczewski. Single particle parameters of a spin polarized electron gas in CdMnTe quantum wells: Comparison between raman scattering and photoluminescence. 28th International Conference on the Physics of Semiconductors (ICPS-28), Jul 2006, Vienna, Unknown Region. pp.1195-1196. ⟨hal-01288162⟩