Photon-assisted electron transmission resonance through a quantum well with spin-orbit coupling

Details Photon-assisted electron transmission resonance through a quantum well with spin-orbit coupling Photon-assisted electron transmission resonance through a quantum well with spin-orbit coupling

2006-02-28

arxiv.org/abs/cond-mat/0602658v1

PHYSICAL REVIEW B73,085307(2006)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

10pages,4figures

Scientific paper

10.1103/PhysRevB.73.085307

Using the effective-mass approximation and Floquet theory, we study the electron transmission over a quantum well in semiconductor heterostructures with Dresselhaus spin-orbit coupling and an applied oscillation field. It is demonstrated by the numerical evaluations that Dresselhaus spin-orbit coupling eliminates the spin degeneracy and leads to the splitting of asymmetric Fano-type resonance peaks in the conductivity. In turn, the splitting of Fano-type resonance induces the spin- polarization-dependent electron-current. The location and line shape of Fano-type resonance can be controlled by adjusting the oscillation frequency and the amplitude of external field as well. These interesting features may be a very useful basis for devising tunable spin filters.

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