Spin orbit torques in Pt-based heterostructures with van der Waals interface  

作　　者：Qian Chen Weiming Lv Shangkun Li Wenxing Lv Jialin Cai Yonghui Zhu Jiachen Wang Rongxin Li Baoshun Zhang Zhongming Zeng 陈倩;吕伟明;李尚坤;吕文星;蔡佳林;朱永慧;王佳晨;李荣鑫;张宝顺;曾中明(Key Laboratory of Multifunctional Nanomaterials and Smart Systems,Suzhou Institute of Nano-Tech and Nano-Bionics,Chinese Academy of Sciences,Suzhou 215123,China;Nanchang Nano-Devices and Technologies Division,Suzhou Institute of Nano-Tech and Nano-Bionics,Chinese Academy of Sciences,Nanchang 330200,China;Physics Laboratory,Industrial Training Center,Shenzhen Polytechnic,Shenzhen 518055,China)

机构地区：[1]Key Laboratory of Multifunctional Nanomaterials and Smart Systems,Suzhou Institute of Nano-Tech and Nano-Bionics,Chinese Academy of Sciences,Suzhou 215123,China [2]Nanchang Nano-Devices and Technologies Division,Suzhou Institute of Nano-Tech and Nano-Bionics,Chinese Academy of Sciences,Nanchang 330200,China [3]Physics Laboratory,Industrial Training Center,Shenzhen Polytechnic,Shenzhen 518055,China

出　　处：《Chinese Physics B》2021年第9期13-18,共6页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant Nos.51732010,51802341,and 12004415);the China Postdoctoral Science Foundation(Grant Nos.2020M671592,2019M661965);the Natural Science Foundation of Jiangsu Province,China(Grant No.BK20200255).

摘　　要：Spin orbit torques(SOTs)in ferromagnet/heavy-metal heterostructures have provided great opportunities for efficient manipulation of spintronic devices.However,deterministically field-free switching of perpendicular magnetization with SOTs is forbidden because of the global two-fold rotational symmetry in conventional heavy-metal such as Pt.Here,we engineer the interface of Pt/Ni heterostructures by inserting a monolayer MoTe_(2)with low crystal symmetry.It is demonstrated that the spin orbit efficiency,as well as the out-of-plane magnetic anisotropy and the Gilbert damping of Ni are enhanced,due to the effect of orbital hybridization and the increased spin scatting at the interface induced by MoTe_(2).Particularly,an out-of-plane damping-like torque is observed when the current is applied perpendicular to the mirror plane of the MoTe_(2)crystal,which is attributed to the interfacial inversion symmetry breaking of the system.Our work provides an effective route for engineering the SOT in Pt-based heterostructures,and offers potential opportunities for van der Waals interfaces in spintronic devices.

关 键 词：spin orbit torque MoTe_(2) van der Waals interface crystal symmetry 

分 类 号：TB34[一般工业技术—材料科学与工程]