Spin susceptibility enhancement of a spin polarized two dimensional electron gas determined by Raman spectroscopy

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

1 INSP - Institut des Nanosciences de Paris

We show Raman Scattering measurements by spin flip excitations of a spin polarized two-dimensional electron gas embedded in a doped CdMnTe quantum well. Depolarized Raman spectra exhibit a coexistence of the collective Spin Flip Wave and the Single Particle Spin Flip Excitation. At vanishing wavevector, we show that these excitations provide direct deternimation of Z, the bare and Z*, the enhanced Zeeman energies. We link these two quantities with recent magneto-transport measurement of the spin susceptibility enhancement due to Coulomb exchange and correlations.

Mots clés: electronic Raman scattering; spin-polarized electron gas; Zeeman splitting; semi-magnetic quantum well

Domaines: Matière Condensée [cond-mat]

Florent Perez, C. Aku-Leh, Bernard Jusserand, D. Richards, G. Karczewski. Spin susceptibility enhancement of a spin polarized two dimensional electron gas determined by Raman spectroscopy. 28th International Conference on the Physics of Semiconductors (ICPS-28), Jul 2006, Vienna, Unknown Region. pp.1295-1296. ⟨hal-01288163⟩