Local magnetic moment oscillation around an Anderson impurity on graphene  

作　　者：Shuai Li Zhen Ma Jin-Hua Gao 

机构地区：[1]School of Science,Hebei University of Science and Technology,Shijiazhuang 050018,China [2]School of Electronics and Information,Zhengzhou University of Light Industry,Zhengzhou 450002,China [3]School of Physics and Wuhan National High Magnetic Field Center,Huazhong University of Science and Technology,Wuhan 430074,China

出　　处：《Science China(Physics,Mechanics & Astronomy)》2025年第1期188-197,共10页中国科学:物理学、力学、天文学(英文版)

基　　金：supported by the National Natural Science Foundation of China(Grant No.12141401);the National Key Research and Development Program of China(Grant No.2022YFA1403501);the National Natural Science Foundation of China(Grant Nos.12174130 and 12474169);supported by the National Natural Science Foundation of China(Grant No.12404088)。

摘　　要：We theoretically investigate the spin resolved Friedel oscillation(FO)and quasiparticle interference(QPI)in graphene induced by an Anderson impurity.Once the impurity becomes magnetic,the resulted FO becomes spin dependent,which gives rise to a local magnetic moment oscillation with an envelop decaying as r^(-2) in real space in the doping cases.Meanwhile,at half filling,the electron density and local magnetic moment will not oscillate but decay as r^(-3).Such spin resolved FO has both sublattice and spin asymmetry.Interestingly,the local magnetic moment decay at half filling only occurs at one sublattice of graphene,which is quite like the phenomenon observed in the STM experiment(H.González-Herrero et al.,Science 352,437(2016)).We further give an analytic formula about such spin dependent FO based on the stationary phase approximation.Finally,we study the interference of quasiparticles around the magnetic impurity by calculating the spin dependent Fourier-transformed local density of states(FT-LDOS).Our work gives a comprehensive understanding about the local magnetic moment oscillation around an Anderson impurity on graphene.

关 键 词：Friedel oscillation local magnetic moment GRAPHENE Anderson impurity 

分 类 号：O17[理学—数学]