Nonreciprocal coherent coupling of nanomagnets by exchange spin waves  

作　　者：Hanchen Wang Jilei Chen Tao Yu Chuanpu Liu Chenyang Guo Song Liu Ka Shen Hao Jia Tao Liu Jianyu Zhang Marco A.Cabero Z Qiuming Song Sa Tu Mingzhong Wu Xiufeng Han Ke Xia Dapeng Yu Gerrit E.W.Bauer Haiming Yu 

机构地区：[1]Fert Beijing Institute,School of Integrated Circuit Science and Engineering,Beijing Advanced Innovation Center for Big Data and Brain Computing,Beihang University,Beijing 100191,China [2]Max Planck Institute for the Structure and Dynamics of Matter,22761 Hamburg,Germany [3]Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,University of Chinese Academy of Sciences,Chinese Academy of Sciences,Beijing 100190,China [4]Shenzhen Institute for Quantum Science and Engineering(SIQSE),and Department of Physics,Southern University of Science and Technology(SUSTech),Shenzhen 518055,China [5]Department of Physics,Beijing Normal University,Beijing 100875,China [6]Department of Physics,Colorado State University,Fort Collins,Colorado 80523,USA [7]Kavli Institute of Nanoscience,Delft University of Technology,2628 CJ Delft,The Netherlands [8]Institute for Materials Research,WPI-AIMR and CSNR,Tohoku University,Sendai 980-8577,Japan [9]Zernike Institute for Advanced Materials,University of Groningen,Groningen,Nijenborgh 4,9747 AG Groningen,The Netherlands

出　　处：《Nano Research》2021年第7期2133-2138,共6页纳米研究（英文版）

基　　金：We wish to acknowledge the support by the National Key Research and Development Program of China(Nos.2016YFA0300802 and 2017YFA0206200);the National Natural Science Foundation of China(NSFC)(Nos.11674020,12074026 and U1801661);the 111 talent program B16001;G.B.was supported by the Netherlands Organization for Scientific Research(NWO)and Japan Society for the Promotion of Science Kakenhi Grants-in-Aid for Scientific Research(No.19H006450);T.Y.was funded through the Emmy Noether Program of Deutsche Forschungsgemeinschaft(SE 2558/2-1);K.X.thanks the National Key Research and Development Program of China(Nos.2017YFA0303304 and 2018YFB0407601);the National Natural Science Foundation of China(Nos.61774017 and 11734004);K.S.was supported by the Fundamental Research Funds for the Central Universities(No.2018EYT02);M.Z.W.were supported by the US National Science Foundation(No.EFMA-1641989).

摘　　要：Nanomagnets are widely used to store information in non-volatile spintronic devices.Spin waves can transfer information with low-power consumption as their propagations are independent of charge transport.However,to dynamically couple two distant nanomagnets via spin waves remains a major challenge for magnonics.Here we experimentally demonstrate coherent coupling of two distant Co nanowires by fast propagating spin waves in an yttrium iron garnet thin film with sub-50 nm wavelengths.Magnons in two nanomagnets are unidirectionally phase-locked with phase shifts controlled by magnon spin torque and spin-wave propagation.The coupled system is finally formulated by an analytical theory in terms of an effective non-Hermitian Hamiltonian.Our results are attractive for analog neuromorphic computing that requires unidirectional information transmission.

关 键 词：SPINTRONICS NANOMAGNETS spin waves coherent coupling NONRECIPROCITY 

分 类 号：O41[理学—理论物理]