An Origin of Dzyaloshinskii–Moriya Interaction at Graphene-Ferromagnet Interfaces Due to the Intralayer RKKY/BR Interaction  

作　　者：Jin Yang Jian Li Liangzhong Lin Jia-Ji Zhu 杨锦;李健;林亮中;朱家骥(School of Science and Laboratory of Quantum Information Technology,Chongqing University of Posts and Telecommunications,Chongqing 400065,China;School of Information Engineering,Zhongshan Polytechnic,Zhongshan 528400,China)

机构地区：[1]School of Science and Laboratory of Quantum Information Technology,Chongqing University of Posts and Telecommunications,Chongqing 400065,China [2]School of Information Engineering,Zhongshan Polytechnic,Zhongshan 528400,China

出　　处：《Chinese Physics Letters》2020年第8期130-135,共6页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China(Grant Nos.11404043 and 1160041160);the Key Technology Innovations Project to Industries of Chongqing(Grant No.cstc2016zdcy-ztzx0067);the Graduate Research Innovation Project of Chongqing(Grants No.CYS18253).

摘　　要：We present a theory of both the itinerant carrier-mediated RKKY interaction and the virtual excitations-mediated Bloembergen–Rowland(BR)interaction between magnetic moments in graphene induced by proximity effect with a ferromagnetic film.It is shown that the RKKY/BR interaction consists of the Heisenberg,Ising,and Dzyaloshinskii–Moriya(DM)terms.In the case of the nearest distance,we estimate the DM term from the RKKY/BR interaction is about$0.13$meV for the graphene/Co interface,which is consistent with the experimental result of DM interaction$0.16\pm0.05$meV.Our calculations indicate that the intralayer RKKY/BR interaction may be a possible physical origin of the DM interaction in the graphene-ferromagnet interface.This work provides a new perspective to comprehend the DM interaction in graphene/ferromagnet systems.

关 键 词：film. INTERACTION RKKY 

分 类 号：TQ127.11[化学工程—无机化工] O482.5[理学—固体物理]