Rashba quantum wire: exact solution and ballistic transport (Articolo in rivista)

Type
Label
  • Rashba quantum wire: exact solution and ballistic transport (Articolo in rivista) (literal)
Anno
  • 2007-01-01T00:00:00+01:00 (literal)
Alternative label
  • Perroni, CA; Bercioux, D; Ramaglia, VM; Cataudella, V (2007)
    Rashba quantum wire: exact solution and ballistic transport
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Perroni, CA; Bercioux, D; Ramaglia, VM; Cataudella, V (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 19 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Forschungszentrum Julich, Inst Festkorperforsch, D-52425 Julich, Germany; Univ Regensburg, Inst Theoret Phys, D-93040 Regensburg, Germany; Univ Freiburg, Inst Phys, D-79104 Freiburg, Germany; Univ Naples Federico II, Coherentia CNR, INFM, I-80126 Naples, Italy; Univ Naples Federico II, Dipartimento Sci Fisiche, I-80126 Naples, Italy (literal)
Titolo
  • Rashba quantum wire: exact solution and ballistic transport (literal)
Abstract
  • The effect of Rashba spin-orbit interaction in quantum wires with hard-wall boundaries is discussed. The exact wavefunction and eigenvalue equation are worked out, pointing out the mixing between the spin and spatial parts. The spectral properties are also studied within perturbation theory with respect to the strength of the spin - orbit interaction and diagonalization procedure. A comparison is made with the results of a simple model, the two-band model, that takes account only of the first two sub-bands of the wire. Finally, the transport properties within the ballistic regime are analytically calculated for the twoband model and through a tight-binding Green function for the entire system. Single and double interfaces separating regions with different strengths of spin orbit interaction are analysed by injecting carriers into the first and the second sub-band. It is shown that in the case of a single interface the spin polarization in the Rashba region is different from zero, and in the case of two interfaces the spin polarization shows oscillations due to spin-selective bound states. (literal)
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