ITP OpenIR  > 理论物理所2017年知识产出
Kitaev materials beyond iridates: Order by quantum disorder and Weyl magnons in rare-earth double perovskites
Li, FY; Li, YD; Yu, Y; Paramekanti, A; Chen, G; Chen, G (reprint author), Fudan Univ, Dept Phys, Ctr Field Theory & Particle Phys, State Key Lab Surface Phys, Shanghai 200433, Peoples R China.; Chen, G (reprint author), Collaborat Innovat Ctr Adv Microstruct, Nanjing 210093, Jiangsu, Peoples R China.; Chen, G (reprint author), Perimeter Inst Theoret Phys, Waterloo, ON N2L 2Y5, Canada.
2017
发表期刊PHYSICAL REVIEW B
卷号95期号:8页码:85132
文章类型Article
摘要Motivated by the experiments on the rare-earth double perovskites, we propose a generalized Kitaev-Heisenberg model to describe the generic interaction between the spin-orbit-entangled Kramers doublets of the rare-earth moments. We carry out a systematic analysis of the mean-field phase diagram of this new model. In the phase diagram, there exist large regions with a continuous U(1) or O(3) degeneracy. Since no symmetry of the model protects such a continuous degeneracy, we predict that the quantum fluctuation lifts the continuous degeneracy and favors various magnetic orders in the phase diagram. From this order by quantum disorder mechanism, we further predict that the magnetic excitations of the resulting ordered phases are characterized by nearly gapless pseudo-Goldstone modes. We find that there exist Weyl magnon excitations for certain magnetic orders. We expect our prediction to inspire further study of Kitaev physics, the order by quantum disorder phenomenon, and topological spin-wave modes in the rare-earth magnets and the systems alike.
学科领域Physics
资助者Ministry of Science and Technology of People's Republic of China [2016YFA0301001] ; Ministry of Science and Technology of People's Republic of China [2016YFA0301001] ; NSERC of Canada ; NSERC of Canada ; Start-Up Funds of Fudan University (Shanghai, People's Republic of China) ; Start-Up Funds of Fudan University (Shanghai, People's Republic of China) ; Thousand-Youth-Talent Program of People's Republic of China ; Thousand-Youth-Talent Program of People's Republic of China ; Government of Canada through the Department of Innovation, Science and Economic Development Canada ; Government of Canada through the Department of Innovation, Science and Economic Development Canada ; Province of Ontario through the Ministry of Research, Innovation and Science ; Province of Ontario through the Ministry of Research, Innovation and Science ; Ministry of Science and Technology of People's Republic of China [2016YFA0301001] ; Ministry of Science and Technology of People's Republic of China [2016YFA0301001] ; NSERC of Canada ; NSERC of Canada ; Start-Up Funds of Fudan University (Shanghai, People's Republic of China) ; Start-Up Funds of Fudan University (Shanghai, People's Republic of China) ; Thousand-Youth-Talent Program of People's Republic of China ; Thousand-Youth-Talent Program of People's Republic of China ; Government of Canada through the Department of Innovation, Science and Economic Development Canada ; Government of Canada through the Department of Innovation, Science and Economic Development Canada ; Province of Ontario through the Ministry of Research, Innovation and Science ; Province of Ontario through the Ministry of Research, Innovation and Science
DOIhttp://dx.doi.org/10.1103/PhysRevB.95.085132
关键词[WOS]MAGNETIC-PROPERTIES ; SPIN ; ANTIFERROMAGNETS
语种英语
资助者Ministry of Science and Technology of People's Republic of China [2016YFA0301001] ; Ministry of Science and Technology of People's Republic of China [2016YFA0301001] ; NSERC of Canada ; NSERC of Canada ; Start-Up Funds of Fudan University (Shanghai, People's Republic of China) ; Start-Up Funds of Fudan University (Shanghai, People's Republic of China) ; Thousand-Youth-Talent Program of People's Republic of China ; Thousand-Youth-Talent Program of People's Republic of China ; Government of Canada through the Department of Innovation, Science and Economic Development Canada ; Government of Canada through the Department of Innovation, Science and Economic Development Canada ; Province of Ontario through the Ministry of Research, Innovation and Science ; Province of Ontario through the Ministry of Research, Innovation and Science ; Ministry of Science and Technology of People's Republic of China [2016YFA0301001] ; Ministry of Science and Technology of People's Republic of China [2016YFA0301001] ; NSERC of Canada ; NSERC of Canada ; Start-Up Funds of Fudan University (Shanghai, People's Republic of China) ; Start-Up Funds of Fudan University (Shanghai, People's Republic of China) ; Thousand-Youth-Talent Program of People's Republic of China ; Thousand-Youth-Talent Program of People's Republic of China ; Government of Canada through the Department of Innovation, Science and Economic Development Canada ; Government of Canada through the Department of Innovation, Science and Economic Development Canada ; Province of Ontario through the Ministry of Research, Innovation and Science ; Province of Ontario through the Ministry of Research, Innovation and Science
WOS类目Physics, Condensed Matter
引用统计
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/22120
专题理论物理所2017年知识产出
通讯作者Chen, G (reprint author), Fudan Univ, Dept Phys, Ctr Field Theory & Particle Phys, State Key Lab Surface Phys, Shanghai 200433, Peoples R China.; Chen, G (reprint author), Collaborat Innovat Ctr Adv Microstruct, Nanjing 210093, Jiangsu, Peoples R China.; Chen, G (reprint author), Perimeter Inst Theoret Phys, Waterloo, ON N2L 2Y5, Canada.
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Li, FY,Li, YD,Yu, Y,et al. Kitaev materials beyond iridates: Order by quantum disorder and Weyl magnons in rare-earth double perovskites[J]. PHYSICAL REVIEW B,2017,95(8):85132.
APA Li, FY.,Li, YD.,Yu, Y.,Paramekanti, A.,Chen, G.,...&Chen, G .(2017).Kitaev materials beyond iridates: Order by quantum disorder and Weyl magnons in rare-earth double perovskites.PHYSICAL REVIEW B,95(8),85132.
MLA Li, FY,et al."Kitaev materials beyond iridates: Order by quantum disorder and Weyl magnons in rare-earth double perovskites".PHYSICAL REVIEW B 95.8(2017):85132.
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