Abstract:
:Quantum magnets provide the simplest example of strongly interacting quantum matter, yet they continue to resist a comprehensive understanding above one spatial dimension. We explore a promising framework in two dimensions, the Dirac spin liquid (DSL) - quantum electrodynamics (QED3) with 4 Dirac fermions coupled to photons. Importantly, its excitations include magnetic monopoles that drive confinement. We address previously open key questions - the symmetry actions on monopoles on square, honeycomb, triangular and kagome lattices. The stability of the DSL is enhanced on triangular and kagome lattices compared to bipartite (square and honeycomb) lattices. We obtain the universal signatures of the DSL on triangular and kagome lattices, including those of monopole excitations, as a guide to numerics and experiments on existing materials. Even when unstable, the DSL helps unify and organize the plethora of ordered phases in correlated two-dimensional materials.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Song XY,Wang C,Vishwanath A,He YCdoi
10.1038/s41467-019-11727-3subject
Has Abstractpub_date
2019-09-18 00:00:00pages
4254issue
1issn
2041-1723pii
10.1038/s41467-019-11727-3journal_volume
10pub_type
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