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Exchange-correlation effects on quantum wires with spin-orbit interactions under the influence of in-plane magnetic fields

AuthorsMalet, Francesc; Pi, Martí; Barranco, Manuel; Serra, Llorenç ; Lipparini, Enrico
KeywordsDensity functional theory
Electrical conductivity
Electron correlations
Electronic density of states
Exchange interactions (electron)
Ground states
Semiconductor quantum wires
Spin-orbit interactions
Issue Date1-Sep-2007
PublisherAmerican Physical Society
CitationPhysical Review B 76, 115306 (2007)
AbstractWithin the noncollinear local spin-density approximation, we have studied the ground state structure of a parabolically confined quantum wire submitted to an in-plane magnetic field, including both Rashba and Dresselhaus spin-orbit interactions. We have explored a wide range of linear electronic densities in the weak (strong) coupling regimes that appear when the ratio of spin-orbit to confining energy is small (large). These results are used to obtain the conductance of the wire. In the strong coupling limit, the interplay between the applied magnetic field irrespective of the in-plane direction, the exchange-correlation energy, and the spin-orbit energy produces anomalous plateaus in the conductance vs linear density plots that are otherwise absent, or washes out plateaus that appear when the exchange-correlation energy is not taken into account.
Description12 pages.-- PACS numbers: 73.63.Nm, 71.70.Ej, 71.15.Mb, 71.70.Gm.-- Final full-text version of the paper available at: http://dx.doi.org/10.1103/PhysRevB.76.115306.
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