تقرير
Negative nonlocal resistance in mesoscopic gold Hall bars: Absence of giant spin Hall effect
| العنوان: | Negative nonlocal resistance in mesoscopic gold Hall bars: Absence of giant spin Hall effect |
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| المؤلفون: | Mihajlovic, G., Pearson, J. E., Garcia, M. A., Bader, S. D., Hoffmann, A. |
| المصدر: | Phys. Rev. Lett. 103, 166601 (2009) |
| سنة النشر: | 2009 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Mesoscale and Nanoscale Physics, Condensed Matter - Materials Science |
| الوصف: | We report the observation of negative nonlocal resistances in multiterminal mesoscopic gold Hall bar structures whose characteristic dimensions are larger than the electron mean-free path. Our results can only be partially explained by a classical diffusive model of the nonlocal transport, and are not consistent with a recently proposed model based on spin Hall effects. Instead, our analysis suggests that a quasiballistic transport mechanism is responsible for the observed negative nonlocal resistance. Based on the sensitivity of our measurements and the spin Hall effect model, we find an upper limit for the spin Hall angle in gold of 0.022 at 4.5 K. Comment: 4 pages, 5 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevLett.103.166601 |
| URL الوصول: | http://arxiv.org/abs/0902.3686 |
| رقم الأكسشن: | edsarx.0902.3686 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevLett.103.166601 |
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