Current induced spin-orbit magnetic fields (iSOFs), arising either in single-crystalline ferromagnets with broken inversion symmetry1,2 or in non-magnetic metal/ferromagnetic metal bilayers3,4, can produce spin-orbit torques which act on a ferromagnet's magnetization,thus offering an efficient way for its manipulation.To further reduce power consumption in spin-orbit torque devices, it is highly desirable to control iSOFs by the field-effect, where power consumption is determined by charging/discharging a capacitor5,6. In particular, efficient electric-field control of iSOFs acting on ferromagnetic metals is of vital importance for practical applications. It is known that in single crystalline Fe/GaAs (001) heterostructures with C2v symmetry, interfacial SOFs emerge at the Fe/GaAs (001) interface due to the lack of inversion symmetry7,8. Here, we show that by applying a gate-voltage across the Fe/GaAs interface, interfacial SOFs acting on Fe can be robustly modulated via the change of the magnitude of the interfacial spin-orbit interaction. Our results show that, for the first time, the electric-field in a Schottky barrier is capable of modifying SOFs, which can be exploited for the development of low-power-consumption spin-orbit torque devices.
Persistent Interfacial Topological Hall Effect Demonstrating Electrical Readout of Topological Spin Structures in Insulators
University of Nebraska, Lincoln（内布拉斯加大学林肯分校）；Fudan University（复旦大学）；North Carolina State University（北卡罗来纳州立大学）；Georgia Institute of Technology（佐治亚理工学院）；Bryn Mawr College（布林茅尔学院）；Argonne National Laboratory（阿贡国家实验室）
Wien effect in interfacial water dissociation through proton-permeable graphene electrodes
强电场可以加速分子解离反应。这种被称为维恩效应的现象以前是用高压电解池观察到的，电解池产生的电场约为10^7 V m-1，足以加速弱结合分子的解离（例如，有机物和弱电解质）。对于水离解的常见情况（H2O = H+ + OH-）的维恩效应的观察仍然是难以捉摸的。在这里，我们研究了质子可渗透石墨烯电极附近界面水的解离，并观察到在达到10^8 V m-1以上的电场中反应的强烈加速。石墨烯电极的使用允许测量仅由界面水的解离产生的质子电流，而驱动反应的电场通过由相同场在石墨烯中诱导的载流子密度来监测。所观察到的质子电流的指数增加与Onsager的理论定量一致。我们的研究结果还表明，石墨烯电极可以是有价值的各种界面现象，涉及质子输运的调查。
Indirect Control of Buried CoB Spin Textures via C$_{60}$-Induced Modification of Ir Spin-Orbit Coupling
SUPA School of Physics and Astronomy, University of Glasgow（格拉斯哥大学物理与天文学学院）；School of Physics and Astronomy, University of Leeds（利兹大学物理与天文学学院）；National Physical Laboratory（英国国家物理实验室）；School of Chemical and Process Engineering, University of Leeds（利兹大学化学与工艺工程学院）；AREA Science Park（的里雅斯特科学园区）
Tunnel-Barrier-Engineered Ultrafast Demagnetization and Spin Transport in Graphene-Based Heterostructures
S. N. Bose National Center for Basic Sciences（S.N. 玻色基础科学国家中心）；Indian Institute of Science Education and Research Kolkata（加尔各答印度科学与教育研究所）；Uppsala University（乌普萨拉大学）
