Thermally enhanced Wigner oscillations in two-electron 1D quantum dots (Articolo in rivista)

Type
Label
  • Thermally enhanced Wigner oscillations in two-electron 1D quantum dots (Articolo in rivista) (literal)
Anno
  • 2014-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1088/0953-8984/26/50/505301 (literal)
Alternative label
  • Cavaliere, F.; Ziani, N. Traverso; Negro, F.; Sassetti, M. (2014)
    Thermally enhanced Wigner oscillations in two-electron 1D quantum dots
    in Journal of physics. Condensed matter (Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Cavaliere, F.; Ziani, N. Traverso; Negro, F.; Sassetti, M. (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 26 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
  • 8 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 50 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • University of Genoa; CNR SPIN; University of Wurzburg; University of Pisa; Istituto Nazionale Geofisica e Vulcanologia (INGV) (literal)
Titolo
  • Thermally enhanced Wigner oscillations in two-electron 1D quantum dots (literal)
Abstract
  • Motivated by a recent experiment (Pecker et al 2013 Nat. Phys. 9 576), we study the stability, with respect to thermal effects, of Friedel and Wigner density fluctuations for two electrons trapped in a one-dimensional quantum dot. Diagonalizing the system exactly, the finite-temperature average electron density is computed. While the weak and strong interaction regimes display a Friedel oscillation or a Wigner molecule state at zero temperature, which as expected smear and melt as the temperature increases, a peculiar thermal enhancement of Wigner correlations in the intermediate interaction regime is found. We demonstrate that this effect is due to the presence of two different characteristic temperature scales: T-F, dictating the smearing of Friedel oscillations, and T-W, smoothing Wigner oscillations. In the early Wigner molecule regime, for intermediate interactions, T-F < T-W leading to the enhancement of the visibility of Wigner oscillations. These results complement those obtained within the Luttinger liquid picture, valid for larger numbers of particles. (literal)
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