Vector boson excitations near deconfined quantum critical points
arXiv:1307.6860 · doi:10.1103/PhysRevLett.111.166401
Abstract
We show that the Néel states of two-dimensional antiferromagnets have low energy vector boson excitations in the vicinity of deconfined quantum critical points. We compute the universal damping of these excitations arising from spin-wave emission. Detection of such a vector boson will demonstrate the existence of emergent topological gauge excitations in a quantum spin system.
7 pages, 3 figures
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- Spin excitations in the two-dimensional strongly coupled dimer system malachite
- Magnetism, non-Fermi-liquid behavior and deconfinement in Kondo lattices