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Sign changes and resonance of intrinsic spin hall effect in two dimensional hole gas | | Tianxing Ma
; Qin Liu
; | | Date: |
3 Jun 2006 | | Subject: | Mesoscopic Systems and Quantum Hall Effect | | Abstract: | The intrinsic spin Hall conductance (ISHC) shows rich sign changes by applying a perpendicular magnetic field in a two-dimensional hole gas (2DHG). Especially, a notable sign changes can be achieved by adjusting the characteristic length of the Rashba coupling and hole density at moderate magnetic fields, which can be used to distinguish the effect from the extrinsic one and means a possible application in the future. This sign issue may be easily realized in experiments. The Zeeman splitting is too small to introduce effective degeneracy between different Landau levels in a 2DHG, and the resonant ISHC appears in high hole density and strong magnetic field due to the transition between mostly spin-$-{1/2}$ holes and spin-3/2 holes is confirmed. In weak magnetic field limit, our result agree with previous result. Two likely ways to establish intrinsic spin Hall effect (ISHE) in experiments and a possible application are suggested. | | Source: | arXiv, cond-mat/0606089 | | Services: | Forum | Review | PDF | Favorites | |
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