Spin exciton in a quantum dot with spin-orbit coupling at high magnetic field (Articolo in rivista)

Type
Label
  • Spin exciton in a quantum dot with spin-orbit coupling at high magnetic field (Articolo in rivista) (literal)
Anno
  • 2004-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1103/PhysRevB.69.045314 (literal)
Alternative label
  • Lucignano, P (1)(2); Jouault, B (3); Tagliacozzo, A (1)(2) (2004)
    Spin exciton in a quantum dot with spin-orbit coupling at high magnetic field
    in Physical review. B, Condensed matter and materials physics
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Lucignano, P (1)(2); Jouault, B (3); Tagliacozzo, A (1)(2) (literal)
Pagina inizio
  • 045314 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 69 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 4 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • 1. Coherentia INFM, Unita Napoli, Napoli, Italy 2. Dipartimento di Scienze Fisiche Università di Napoli \"Federico II\", Napoli, Italy 3. GES, UMR 5650, Univ Montpellier II, Montpellier 5, France (literal)
Titolo
  • Spin exciton in a quantum dot with spin-orbit coupling at high magnetic field (literal)
Abstract
  • Coulomb interactions of few (N) electrons confined in a disk-shaped quantum dot, with a large magnetic field B=B-* applied in the z direction (orthogonal to the dot), produce a fully spin-polarized ground state. We numerically study the splitting of the levels corresponding to the multiplet of total spin S=N/2 (each labeled by a different total angular momentum J(z)) in the presence of an electric field parallel to B, coupled to S by a Rashba term. We find that the first excited state is a spin exciton with a reversed spin at the origin. This is reminiscent of the quantum Hall ferromagnet at filling one, which has the skyrmionlike state as its first excited state. The spin-exciton level can be tuned with the electric field and infrared radiation can provide energy and angular momentum to excite it. (literal)
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