Work

Classical symmetry enriched topological orders and distinct monopole charges for dipole-octupole spin ices

Year: 2026

Type: article

Abstract: Distinct symmetry enriched topological orders often do not have classical distinctions. Motivated by the recent progress on the pyrochlore spin ice materials based on the dipole-octupole doublets, we argue that the dipolar spin liquid and the octupolar spin liquid can be distinguished through the magnetic charges of the magnetic monopoles in the classical spin ice regime. It is observed and predicted that the long-range dipole-dipole interaction renders the magnetic monopole of the dipolar spin ice a finite magnetic charge via the dumbbell picture even in the classical regime. For the octupolar spin ice, however, a zero magnetic charge is expected from this mechanism in the classical regime. We expect this smoking-gun observation to resolve the debate on the nature of Ce$_2$Sn$_2$O$_7$, and more broadly, this work may inspire further experiments and thoughts on the Ce-pyrochlore spin liquids, Nd-pyrochlore antiferromagnets, Er-based spinels, and the distinct properties of the emergent quasiparticles in various symmetry enriched topological phases.

Source: Physical review. B./Physical review. B

DOI: 10.1103/kf3x-rhl1

Authors: Pengwei Zhao, Gang v. Chen

Institutions: Peking University, Shanghai Jiao Tong University, Collaborative Innovation Center of Quantum Matter, University of Hong Kong

Language: English

Topic: Advanced Condensed Matter Physics

Subfield: Condensed Matter Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: National Natural Science Foundation of China, Ministry of Science and Technology of the People's Republic of China, Peking University, Fundamental Research Funds for the Central Universities

Awards: G5194274424, G6998600328, G8136996646