A molecular state of correlated electrons in a quantum dot (Articolo in rivista)

Type
Label
  • A molecular state of correlated electrons in a quantum dot (Articolo in rivista) (literal)
Anno
  • 2008-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1038/nphys944 (literal)
Alternative label
  • Kalliakos, S; Rontani, M; Pellegrini, V; Garcia, CP; Pinczuk, A; Goldoni, G; Molinari, E; Pfeiffer, LN; West, KW (2008)
    A molecular state of correlated electrons in a quantum dot
    in Nature physics (Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Kalliakos, S; Rontani, M; Pellegrini, V; Garcia, CP; Pinczuk, A; Goldoni, G; Molinari, E; Pfeiffer, LN; West, KW (literal)
Pagina inizio
  • 467 (literal)
Pagina fine
  • 471 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
  • http://www.nature.com/nphys/journal/v4/n6/full/nphys944.html (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 4 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • \"[Rontani, Massimo; Goldoni, Guido; Molinari, Elisa] CNR, INFM S3, I-41100 Modena, Italy; [Rontani, Massimo; Goldoni, Guido; Molinari, Elisa] Univ Modena & Reggio Emilia, Dept Phys, I-41100 Modena, Italy; [Kalliakos, Sokratis; Pellegrini, Vittorio; Garcia, Cesar Pascual] CNR, INFM, NEST, I-56126 Pisa, Italy; [Kalliakos, Sokratis; Pellegrini, Vittorio; Garcia, Cesar Pascual] Scuola Normale Super Pisa, I-56126 Pisa, Italy; [Pinczuk, Aron] Columbia Univ, Dept Appl Phys, New York, NY 10027 USA; [Pinczuk, Aron] Columbia Univ, Dept Appl Math, New York, NY 10027 USA; [Pinczuk, Aron] Columbia Univ, Dept Phys, New York, NY 10027 USA; [Pinczuk, Aron; Pfeiffer, Loren N.; West, Ken W.] Bell Labs, Murray Hill, NJ 07974 USA (literal)
Titolo
  • A molecular state of correlated electrons in a quantum dot (literal)
Abstract
  • Correlation among particles in finite quantum systems leads to complex behaviour and novel states of matter. One remarkable example is predicted to occur in a semiconductor quantum dot(1-3), where at vanishing electron density the Coulomb interaction between electrons rigidly fixes their relative positions as those of the nuclei in a molecule(4-14). In this limit, the neutral few-body excitations are roto-vibrations, which have either rigid-rotor or relative-motion character(15). In the weak correlation regime, on the contrary, the Coriolis force mixes rotational and vibrational motions. Here, we report evidence for roto-vibrationalmodes of an electron molecular state at densities for which electron localization is not yet fully achieved. We probe these collective modes by using inelastic light scattering(16-18) in quantum dots containing four electrons(19). Spectra of low-lying excitations associated with changes of the relative-motion wavefunction-the analogues of the vibration modes of a conventional molecule-do not depend on the rotational state represented by the total angular momentum. Theoretical simulations by the configuration-interaction method(20) are in agreement with the observed roto-vibrational modes and indicate that such molecular excitations develop at the onset of short-range correlation. (literal)
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