期刊
PHYSICAL REVIEW B
卷 92, 期 10, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.92.100401
关键词
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资金
- Helmholtz Virtual Institute New States of Matter and their Excitations
- US National Science Foundation [DMR-1311781]
- Alexander von Humboldt Foundation
- German Science Foundation (DFG) [SFB II43]
We consider the effect of adding quantum dynamics to a classical topological spin liquid, with a particular view of how to best detect its presence in experiment. For the Coulomb phase of spin ice, we find quantum effects to be most visible in the gauge-charged monopole excitations. In the presence of weak dilution with nonmagnetic ions we find a particularly crisp phenomenon, namely, the emergence of hydrogenic excited states in which a magnetic monopole is bound to a vacancy at various distances. Via a mapping to an analytically tractable single particle problem on the Bethe lattice, we obtain an approximate expression for the dynamic neutron scattering structure factor.
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