Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2007-07-16
Phys. Rev. Lett. 100, 026602 (2008)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
Some typos corrected
Scientific paper
10.1103/PhysRevLett.100.026602
We obtain analytic formulas for the frequency-dependent spin-Hall conductivity of a two-dimensional electron gas (2DEG) in the presence of impurities, linear spin-orbit Rashba interaction, and external magnetic field perpendicular to the 2DEG. We show how different mechanisms (skew-scattering, side-jump, and spin precession) can be brought in or out of focus by changing controllable parameters such as frequency, magnetic field, and temperature. We find, in particular, that the d.c. spin Hall conductivity vanishes in the absence of a magnetic field, while a magnetic field restores the skew-scattering and side-jump contributions proportionally to the ratio of magnetic and Rashba fields.
Hankiewicz Ewelina M.
Vignale Giovanni
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