Nonadiabatic Generation of a Pure Spin Current in a One-Dimensional Quantum Ring with Spin-Orbit Interaction

@article{Ni2010NonadiabaticGO,
  title={Nonadiabatic Generation of a Pure Spin Current in a One-Dimensional Quantum Ring with Spin-Orbit Interaction},
  author={Marian Niţă and Dan C. Marinescu and Andrei Manolescu and Vidar Gudmundsson},
  journal={Physical Review B},
  year={2010},
  volume={83},
  pages={155427}
}
We demonstrate the theoretical possibility of obtaining a pure spin current in a 1D ring with spin-orbit interaction by irradiation with a non-adiabatic, two-component terahertz laser pulse, whose spatial asymmetry is reflected by an internal dephasing angle $\phi$. The stationary solutions of the equation of motion for the density operator are obtained for a spin-orbit coupling linear in the electron momentum (Rashba) and used to calculate the time-dependent charge and spin currents. We find… 

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References

SHOWING 1-10 OF 12 REFERENCES

Phys

  • Rev. 100, 580
  • 1955

Phys

  • Rev. B 70, 195346
  • 2004

Phys

  • Rev. B 68, 075303
  • 2003

Phys

  • Rev. B 50, 4642
  • 1994

Phys

  • Rev. B 66, 033107
  • 2002

Phys

  • Rev. B 74, 235315
  • 2006

Phys

  • Rev. B 68, 115311
  • 2003

Phys

  • Rev. B 67, 161301
  • 2003

Physica E 27

  • 278
  • 2005

Phys

  • Rev. B 50, 8460
  • 1994