Sizeable Kane-Mele-like spin orbit coupling in graphene decorated with iridium clusters
Sizeable Kane-Mele-like spin orbit coupling in graphene decorated with iridium clusters
复制标题
铱簇装饰石墨烯中的类似凯恩-梅勒自旋轨道耦合
DOI：
10.1063/1.4950870
复制
发表时间：
2016-05-16
影响因子：
4
通讯作者：
Wang, Guanghou
中科院分区：
文献类型：
--
作者：
Qin, Yuyuan;Wang, Siqi;Wang, Guanghou
石墨烯的自旋轨道耦合强度可以通过沉积铱纳米团簇来增强。团簇沉积后，弱局域化在零场附近受到强烈抑制，而不是变为弱反局域化。拟合磁阻可得出自旋弛豫时间，随着背栅的应用，自旋弛豫时间增加了两个数量级。发现自旋弛豫时间与电子弹性散射时间成正比，证明了 Elliot-Yafet 自旋弛豫机制。通过将温度依赖性外推至零，可以确定超过 5.5 meV 的类似 Kane-Mele 耦合强度。由 AIP 出版社出版。
The spin-orbit coupling strength of graphene can be enhanced by depositing iridium nanoclusters. Weak localization is intensely suppressed near zero fields after the cluster deposition, rather than changing to weak anti-localization. Fitting the magnetoresistance gives the spin relaxation time, which increases by two orders with the application of a back gate. The spin relaxation time is found to be proportional to the electronic elastic scattering time, demonstrating the Elliot-Yafet spin relaxation mechanism. A sizeable Kane-Mele-like coupling strength of over 5.5 meV is determined by extrapolating the temperature dependence to zero. Published by AIP Publishing.