Spin polarization of the current in a correlated one-dimensional conductor with an impurity |
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Authors: | S N Artemenko R R Vakhitov S V Remizov |
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Institution: | 1.Kotel’nikov Institute of Radio Engineering and Electronics,Russian Academy of Sciences,Moscow,Russia;2.Moscow Institute of Physics and Technology,Dolgoprudnyi, Moscow region,Russia |
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Abstract: | The spin transport as the current flows through an impurity in a one-dimensional conductor is analyzed. The interacting electrons
are described in terms of the Luttinger liquid theory. Both the Coulomb and short-range interactions are considered; the latter
appears when the gate screens the long-range part of the Coulomb potential. The cases of magnetic and nonmagnetic impurities
are considered. It has been revealed that, for a magnetic impurity, the electric current flow induces the generation of the
spin current, which has direct and alternating components. At low temperatures and voltages, the current can be completely
spin-polarized. For a nonmagnetic impurity, the spin current generation is absent. The spin current flowing though the wire
affects the current-voltage characteristic for both magnetic and nonmagnetic impurities. The results have been obtained for
a rather strong electron-electron interaction. |
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Keywords: | |
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