摘要
We investigate the effects of long-range interactions on the spin wave spectra and the competition between magnetic phases on a frustrated square lattice with large spin S.Applying the spin wave theory and assisted with symmetry analysis,we obtain analytical expressions for spin wave spectra of competing Neel and(π,0)stripe states of systems containing anyorder long-range interactions.In the specific case of long-range interactions with power-law decay,we find surprisingly that the staggered long-range interaction suppresses quantum fluctuation and enlarges the ordered moment,especially in the Neel state,and thus extends its phase boundary to the stripe state.Our findings illustrate the rich possibilities of the roles of long-range interactions,and advocate future investigations in other magnetic systems with different structures of interactions.
作者
谭宇婷
姚道新
Yuting Tan;Dao-Xin Yao(State Key Laboratory of Optoelectronic Materials and Technologies,Center for Neutron Science and Technology,Guangdong Provincial Key Laboratory of Magnetoelectric Physics and Devices,School of Physics,Sun Yat-sen University,Guangzhou 510275,China)
基金
supported by NKRDPC2018YFA0306001,NKRDPC-2022YFA1402802,NSFC-92165204,NSFC-11974432,GBABRF-2019A1515011337,Shenzhen International Quantum Academy(Grant No.SIQA202102)
Leading Talent Program of Guangdong Special Projects(No.201626003).