Spin-1 pyrochlore antiferromagnets: Theory, model, and materials’ survey

doi:10.1007/s11467-020-0974-4

Front. Phys.

2020, Vol. 15

Issue (6) : 63201 https://doi.org/10.1007/s11467-020-0974-4

TOPICAL REVIEW

Spin-1 pyrochlore antiferromagnets: Theory, model, and materials’ survey

Yong-Hao Gao¹, Xu-Ping Yao², Fei-Ye Li¹, Gang Chen²(

)

¹. State Key Laboratory of Surface Physics and Department of Physics, Fudan University, Shanghai 200433, China
². Department of Physics and HKU-UCAS Joint Institute for Theoretical and Computational Physics at Hong Kong, The University of Hong Kong, Hong Kong, China

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Abstract

Pyrochlore magnets can be a unique platform to demonstrate numerous important concepts and applications of frustrated magnetic physics in modern condensed matter physics. Most works on pyrochlore magnets deal with the interacting spin-1/2 local moments, while much less works have studied the spin-1 systems. We here review the physics with interacting spin-1 local moments on the pyrochlore lattice to illustrate the potentially interesting physics associated with spin-1 magnets. The generic pyrochlore spin-1 model includes the antiferromagnetic Heisenberg interaction, the Dzyaloshinskii– Moriya interaction and the single-ion spin anisotropy. The global phase diagram of this generic spin model is reviewed, and the relation between different quantum phases in the phase diagram is clarified. The critical properties of the transition from the parent quantum paramagnet to the proximate orders are discussed. The presence of quantum order by disorder in the parts of the ordered phases is analyzed. The elementary excitations with respect to the ground states are further reviewed, and the topological natures of these excitations are carefully addressed. The materials’ relevance of the spin-1 pyrochlore magnets are finally reviewed. This review may provide insights about the interesting spin-1 local moments on frustrated systems.

Keywords topological magnon quantum order by disorder Dzyaloshinskii–Moriya interaction flavor wave theory

Corresponding Author(s): Gang Chen

Issue Date: 21 July 2020

Cite this article:

Yong-Hao Gao,Xu-Ping Yao,Fei-Ye Li, et al. Spin-1 pyrochlore antiferromagnets: Theory, model, and materials’ survey[J]. Front. Phys. , 2020, 15(6): 63201.

URL:

https://academic.hep.com.cn/fop/EN/10.1007/s11467-020-0974-4
https://academic.hep.com.cn/fop/EN/Y2020/V15/I6/63201

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