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Article Dans Une Revue Physical Review Letters Année : 2012

Giant Collective Spin-Orbit Field in a Quantum Well: Fine Structure of Spin Plasmons

Résumé

We employ inelastic light scattering with magnetic fields to study intersubband spin plasmons in a quantum well. We demonstrate the existence of a giant collective spin-orbit (SO) field that splits the spin-plasmon spectrum into a triplet. The effect is remarkable as each individual electron would be expected to precess in its own momentum-dependent SO field, leading to D'yakonov-Perel' dephasing. Instead, many-body effects lead to a striking organization of the SO fields at the collective level. The macroscopic spin moment is quantized by a uniform collective SO field, five times higher than the individual SO field. We provide a momentum-space cartography of this field.
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Dates et versions

hal-01229184 , version 1 (01-06-2016)

Identifiants

Citer

F. Baboux, Florent Pérez, C. A. Ullrich, I. d'Amico, J. Gomez, et al.. Giant Collective Spin-Orbit Field in a Quantum Well: Fine Structure of Spin Plasmons. Physical Review Letters, 2012, 109 (15), pp.166401 ⟨10.1103/PhysRevLett.109.166401⟩. ⟨hal-01229184⟩
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