کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1862247 | 1037572 | 2009 | 4 صفحه PDF | دانلود رایگان |
Using the transfer matrix method, we investigate the electron transmission over multiple-well semiconductor superlattices with Dresselhaus spin–orbit coupling in the potential-well regions. The superlattice structure enhances the effect of spin polarization in the transmission spectrum. The minibands of multiple-well superlattices for electrons with different spin can be completely separated at the low incident energy, leading to the 100% spin polarization in a broad energy windows, which may be an effective scheme for realizing spin filtering. Moreover, for the transmission over n-quantum-well, it is observed that the resonance peaks in the minibands split into n -folds or (n−1)(n−1)-folds depending on the well-width and barrier-thickness, which is different from the case of tunneling through n-barrier structure.
Journal: Physics Letters A - Volume 373, Issue 14, 23 March 2009, Pages 1290–1293