Coulomb-driven organization and enhancement of spin-orbit fields in collective spin excitations - Archive ouverte HAL
Article Dans Une Revue Physical Review B: Condensed Matter and Materials Physics (1998-2015) Année : 2013

Coulomb-driven organization and enhancement of spin-orbit fields in collective spin excitations

F. Baboux
C. A. Ullrich
  • Fonction : Auteur
I. d'Amico
  • Fonction : Auteur
G. Karczewski
  • Fonction : Auteur
T. Wojtowicz
  • Fonction : Auteur

Résumé

Spin-orbit (SO) fields in a spin-polarized electron gas are studied by angle-resolved inelastic light scattering on a CdMnTe quantum well. We demonstrate a striking organization and enhancement of SO fields acting on the collective spin excitation (spin-flip wave). While individual electronic SO fields have a broadly distributed momentum dependence, giving rise to D'yakonov-Perel' dephasing, the collective spin dynamics is governed by a single collective SO field which is drastically enhanced due to many-body effects. The enhancement factor is experimentally determined. These results provide a powerful indication that these constructive phenomena are universal to collective spin excitations of conducting systems. DOI: 10.1103/PhysRevB.87.121303

Dates et versions

hal-01229152 , version 1 (16-11-2015)

Identifiants

Citer

F. Baboux, Florent Perez, C. A. Ullrich, I. d'Amico, G. Karczewski, et al.. Coulomb-driven organization and enhancement of spin-orbit fields in collective spin excitations. Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2013, 87 (12), pp.121303(R). ⟨10.1103/PhysRevB.87.121303⟩. ⟨hal-01229152⟩
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