تقرير
Electric field control of spin lifetimes in Nb-SrTiO$_3$ by spin-orbit fields
| العنوان: | Electric field control of spin lifetimes in Nb-SrTiO$_3$ by spin-orbit fields |
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| المؤلفون: | Kamerbeek, A. M., Högl, P., Fabian, J., Banerjee, T. |
| سنة النشر: | 2015 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Materials Science, Condensed Matter - Mesoscale and Nanoscale Physics |
| الوصف: | We show electric field control of the spin accumulation at the interface of the oxide semiconductor Nb-SrTiO$_{3}$ with Co/AlO$_{x}$ spin injection contacts at room temperature. The in-plane spin lifetime $\tau_\parallel$ as well as the ratio of the out-of-plane to in-plane spin lifetime $\tau_\perp/\tau_\parallel$ is manipulated by the built-in electric field at the semiconductor surface, without any additional gate contact. The origin of this manipulation is attributed to Rashba Spin-Orbit Fields (SOFs) at the Nb-SrTiO$_3$ surface and shown to be consistent with theoretical model calculations based on SOF spin flip scattering. Additionally, the junction can be set in a high or low resistance state, leading to a non-volatile control of $\tau_\perp/\tau_\parallel$, consistent with the manipulation of the Rashba SOF strength. Such room temperature electric field control over the spin state is essential for developing energy-efficient spintronic devices and shows promise for complex oxide based (spin)electronics Comment: 5 pages, 4 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevLett.115.136601 |
| URL الوصول: | http://arxiv.org/abs/1508.04649 |
| رقم الأكسشن: | edsarx.1508.04649 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevLett.115.136601 |
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