Anisotropic spin-orbit induced splitting of intersubband spin plasmons

F. Baboux (1) , Florent Pérez (1) , C. A. Ullrich , I. d'Amico , J. Gomez (1) , Mathieu Bernard (1)

1 INSP - Institut des Nanosciences de Paris

The anisotropic splitting of intersubband spin plasmons, resulting from spin-orbit coupling, is studied by angle-resolved inelastic light scattering on a [001]-oriented GaAs/AlGaAs quantum well. Confirming theoretical predictions made in [C. A. Ullrich and M. A. Flatte, Phys. Rev. B 68, 235310 ( 2003)], this splitting is proven to exhibit a characteristic two-fold symmetry with the in-plane orientation, and to increase with increasing modulus of the excitation momentum. This opens the way to a more complete investigation, aiming at evidencing the existence of a collective spin-orbit field driving these excitations.

Domaines: Matière Condensée [cond-mat]

F. Baboux, Florent Pérez, C. A. Ullrich, I. d'Amico, J. Gomez, et al.. Anisotropic spin-orbit induced splitting of intersubband spin plasmons. JEMS 2012 - JOINT EUROPEAN MAGNETIC SYMPOSIA, 2012, 17 AVE DU HOGGAR PARC D ACTIVITES COUTABOEUF BP 112, F-91944 CEDEX A, France. ⟨10.1051/epjconf/20134018002⟩. ⟨hal-01229181⟩