Heikkilä T. T., Nagaev K. E. Nonuniversal shot noise in quasiequilibrium spin valves. Physical Review B , 2013 , 87 (23). р. 235411. ISSN 1098-0121
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Текст
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Аннотация
We show that the breakdown of the Wiedemann-Franz law due to electron--electron scattering in diffusive spin valves may result in a strong suppression of the Fano factor that describes the ratio between shot noise and average current. In the parallel configuration of magnetizations, we find the universal value \sqrt{3}/4 in the absence of a normal-metal spacer layer, but including the spacer leads to a non-monotonous suppression of this value before reaching back to the universal value for large spacer lengths. On the other hand, in the case of an antiparallel configuration with a negligibly small spacer, the Fano factor is \sqrt{3(1-P^2)}/4, where P denotes the polarization of the conductivities. For P→±1, the current through the system is almost noiseless.
| Тип объекта: | Статья |
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| Авторы на русском. ОБЯЗАТЕЛЬНО ДЛЯ АНГЛОЯЗЫЧНЫХ ПУБЛИКАЦИЙ!: | Т. Т. Хейккила, К. Э. Нагаев |
| Подразделения (можно выбрать несколько, удерживая Ctrl): | 185 лаб. теоретических проблем физической электроники |
| URI: | http://cplire.ru:8080/id/eprint/2532 |
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