Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2009-05-05
Physical Review B 81 (2010) 165443
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
Scientific paper
10.1103/PhysRevB.81.165443
We calculate the current-voltage characteristic of a one-dimensional band insulator with magnetic field and Rashba spin-orbit coupling which is connected to nonmagnetic leads. Without spin-orbit coupling we find a complete spin-filtering effect, meaning that the electric transport occurs in one spin channel only. For a large magnetic field which closes the band gap, we show that spin-orbit coupling leads to a transition from metallic to insulating behavior. The oscillations of the different spin-components of the current with the length of the transport channel are studied as well.
Hayn Roland
Japaridze George
Jonckheere Thibaut
Martin Thierry
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