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An efficient multiband envelope function approximation method for spintronics

Cartoixà, X. and Ting, D. Z.-Y. and McGill, T. C. (2003) An efficient multiband envelope function approximation method for spintronics. Nanotechnology, 14 (2). pp. 308-311. ISSN 0957-4484. doi:10.1088/0957-4484/14/2/340.

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We have developed an eight-band finite-difference envelope function approximation model capable of reproducing in almost all situations the true D2d or C2v symmetry of [001] grown zinc-blende heterostructures. We have used our model to study the relative contributions of the bulk inversion asymmetry (BIA) and structural inversion asymmetry to the spin splitting in the conduction band of asymmetric AlSb/GaSb/InAs/AlSb quantum wells, and clarify apparently contradictory statements about the relative magnitude of the two contributions. We show that, in the system under study, the inclusion of BIA effects changes considerably the angular dependence and the magnitude of the splitting. We also investigate how BIA changes the transmission properties of a resonant tunnelling structure.

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Additional Information:© Institute of Physics 2003. Received 4 October 2002, in final form 17 December 2002, Published 23 January 2003, Print publication: Issue 2 (February 2003) SPECIAL ISSUE FEATURING PAPERS FROM THE TRENDS IN NANOTECHNOLOGY (TNT2002) CONFERENCE (SANTIAGO DE COMPOSTELA, SPAIN, 9–13 SEPTEMBER 2002) The authors would like to thank D L Smith and J N Schulman for helpful discussions. This work was supported by a subcontract with HRL, LLC in conjunction with the Office of Naval Research under contract No MDA972-01-C-0002. Part of the work described in this paper was carried out at the Jet Propulsion Laboratory, California Institute of Technology, andwas sponsored by the Defense Advanced Research Projects Agency’s Spins in Semiconductors (SpinS) programme.
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Deposited On:13 Feb 2006
Last Modified:12 Jul 2022 19:41

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