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Long range scattering effects on spin Hall current in $p$-type bulk semiconductors | | S. Y. Liu
; Norman J. M. Horing
; X. L. Lei
; | | Date: |
13 Dec 2005 | | Subject: | Materials Science; Mesoscopic Systems and Quantum Hall Effect | | Abstract: | Employing a nonequilibrium Green’s function approach, we examine the effects of long-range electron-impurity scattering on spin-Hall current in $p$-type bulk semiconductors within the framework of the self-consistent Born approximation. We find that, contrary to the null effect of short-range disorder on spin-Hall current, long-range collisions produce a nonvanishing contribution to the spin-Hall current, which is independent of impurity density and relates only to hole states near the Fermi surface. The sign of this contribution is opposite to that of the previously predicted intrinsic spin-Hall current, leading to a dramatic reduction of the total. Furthermore, we also make clear that the intrinsic spin-Hall effect is a result of an interband transition directly induced by the dc electric field with contributions from all hole states in the Fermi sea. | | Source: | arXiv, cond-mat/0512279 | | Services: | Forum | Review | PDF | Favorites | |
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