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Spin Blocker Using the Interband Rashba Effect in Symmetric Double Quantum Wells
| 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)
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Submitter: 古賀 貴亮
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