Unifying description of competing orders in two-dimensional quantum magnets.

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 Commun

journal_title

Nature communications

authors

Song XY,Wang C,Vishwanath A,He YC

doi

10.1038/s41467-019-11727-3

subject

Has Abstract

pub_date

2019-09-18 00:00:00

pages

4254

issue

1

issn

2041-1723

pii

10.1038/s41467-019-11727-3

journal_volume

10

pub_type

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