تقرير
Negative correlation between the linear and the nonlinear conductance in magnetic tunnel junctions
| العنوان: | Negative correlation between the linear and the nonlinear conductance in magnetic tunnel junctions |
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| المؤلفون: | Iwakiri, Shuichi, Sugimoto, Satoshi, Niimi, Yasuhiro, Kozuka, Yusuke, Takahashi, Yukiko K., Kasai, Shinya, Kobayashi, Kensuke |
| المصدر: | Phys. Rev. B 103, 245427 (2021) |
| سنة النشر: | 2021 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Mesoscale and Nanoscale Physics |
| الوصف: | The current-voltage ($IV$) characteristics beyond the linear response regime of magnetic tunnel junction (MTJ) is systematically investigated. We find a clear negative correlation between the two coefficients to characterize the linear ($I$$\propto$$V$) and the lowest-order nonlinear ($I$$\propto$$V^3$) currents, which holds regardless of the temperature and the thickness of the tunnel barrier. This observation cannot simply be explained by the standard tunneling model such as the Brinkman model, suggesting a mechanism intrinsic to MTJ. We propose a phenomenological model based on the Julli\'ere model that attributes the observed negative correlation to the spin-flip tunneling assisted by a magnon. These results suggest a fundamental law between the linear and the nonlinear response of MTJ. Comment: 7 pages, 7 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevB.103.245427 |
| URL الوصول: | http://arxiv.org/abs/2106.11274 |
| رقم الأكسشن: | edsarx.2106.11274 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevB.103.245427 |
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