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

• 作者: Jia-Ji Zhu Jian Li Jin Yang Liangzhong Lin
• 来源期刊: 中国物理快报（英文版）
• 年，卷（期）: 2020,（8）
• 所属期刊栏目: CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL,MAGNETIC, AND OPTICAL PROPERTIES
• 页码范围: 130-135
• 页数: 6页
• 语种: 英文
• DOI: 10.1088/0256-307X/37/8/087501

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 ± 0.05meV.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.