Spin-current injection and detection in κ-(BEDT-TTF)2Cu[N(CN)2]Br
Spin-current injection and detection in κ-(BEDT-TTF)2Cu[N(CN)2]Br
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DOI：
10.1063/1.4922007
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发表时间：
2015-05-01
期刊：
影响因子：
1.6
通讯作者：
Saitoh, E.
中科院分区：
文献类型：
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作者：
Qiu, Z.;Uruichi, M.;Saitoh, E.
由钇铁石榴石 (YIG) 薄膜的自旋泵浦引起的自旋电流注入有机半导体 kappa-(BEDT-TTF)(2)Cu[N(CN)(2)]Br 薄膜。当YIG薄膜中的磁化动力学被铁磁或自旋波共振激发时，发现在kappa-(BEDT-TTF)(2)Cu[N(CN)(2)]Br薄膜中出现电压信号。磁场角度依赖性测量表明，电压信号受 kappa-(BEDT-TTF)(2)Cu[N(CN)(2)]Br 中的逆自旋霍尔效应控制。我们发现 kappa-(BEDT-TTF)(2)Cu[N(CN)(2)]Br/YIG 系统中的电压信号在 80 K 左右受到严重抑制，在该温度附近发生磁和/或玻璃转变，这意味着自旋电流注入的效率受到在转变附近严重增强的波动的抑制。 (C) 2015 年作者。除非另有说明，所有文章内容均根据 Creative Commons Attribution 3.0 Unported License 获得许可。
Spin-current injection into an organic semiconductor kappa-(BEDT-TTF)(2)Cu[N(CN)(2)]Br film induced by the spin pumping from an yttrium iron garnet (YIG) film. When magnetization dynamics in the YIG film is excited by ferromagnetic or spin-wave resonance, a voltage signal was found to appear in the kappa-(BEDT-TTF)(2)Cu[N(CN)(2)]Br film. Magnetic-field-angle dependence measurements indicate that the voltage signal is governed by the inverse spin Hall effect in kappa-(BEDT-TTF)(2)Cu[N(CN)(2)]Br. We found that the voltage signal in the kappa-(BEDT-TTF)(2)Cu[N(CN)(2)]Br/YIG system is critically suppressed around 80 K, around which magnetic and/or glass transitions occur, implying that the efficiency of the spin-current injection is suppressed by fluctuations which critically enhanced near the transitions. (C) 2015 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution 3.0 Unported License.