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Spin Blocker Using the Interband Rashba Effect in Symmetric Double Quantum Wells

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Please use this identifier to cite or link to this item:http://hdl.handle.net/2115/60228

Title: Spin Blocker Using the Interband Rashba Effect in Symmetric Double Quantum Wells
Authors: Souma, S. Browse this author
Sawada, A. Browse this author
Chen, H. Browse this author
Sekine, Y. Browse this author
Eto, M. Browse this author
Koga, T. Browse this author →KAKEN DB
Issue Date: 29-Sep-2015
Publisher: American Physical Society
Journal Title: Physical review applied
Volume: 4
Issue: 3
Start Page: 34010
Publisher DOI: 10.1103/PhysRevApplied.4.034010
Abstract: We propose a lateral spin-blockade device that uses the interband Rashba effect in a symmetric double quantum well (QW), where the Rashba effect in the conventional sense vanishes because of its inversion symmetry. The interband Rashba effect manifests itself in the off-diagonal term (represented by the parameter eta) in the QW space using the bonding and antibonding basis [Esmerindo Bernardes, John Schliemann, Minchul Lee, J. Carlos Egues, and Daniel Loss, Phys. Rev. Lett. 99, 076603 (2007)]. In such a system, spin selection is possible by tuning the device length, gate electric field and in-plane magnetic field. We particularly show illustrative mechanisms using a one-dimensional model with k = (k(F), 0), where the selected spin can be blocked completely in the presence of the in-plane magnetic field. While the inclusion of the finite k(y) and/or the gate electric field deteriorates the spin polarization P, finite values remain for P (P>11%). Our proposal can also be regarded as an effective way of enhancing a variation of the Rashba-Edelstein effect, the generation of bulk spin polarization by electric current, based on semiconductor band engineering technology.
Rights: ©2015 American Physical Society
Type: article
URI: http://hdl.handle.net/2115/60228
Appears in Collections:情報科学院・情報科学研究院 (Graduate School of Information Science and Technology / Faculty of Information Science and Technology) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 古賀 貴亮

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