Classical spin liquid on the maximally frustrated honeycomb lattice

Rehn, J. ; Sen, Arnab ; Damle, Kedar ; Moessner, R. (2016) Classical spin liquid on the maximally frustrated honeycomb lattice Physical Review Letters, 117 (16). Article ID 167201. ISSN 0031-9007

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We show that the honeycomb Heisenberg antiferromagnet with J1/2=J2=J3, where J1, J2, and J3 are first-, second-, and third-neighbor couplings, respectively, forms a classical spin liquid with pinch-point singularities in the structure factor at the Brillouin zone corners. Upon dilution with nonmagnetic ions, fractionalized degrees of freedom carrying 1/3 of the free moment emerge. Their effective description in the limit of low temperature is that of spins randomly located on a triangular lattice, with a frustrated sublattice-sensitive interaction of long-ranged logarithmic form. The XY version of this magnet exhibits nematic thermal order by disorder. This comes with a clear experimental diagnostic in neutron scattering, which turns out to apply also to the case of the celebrated planar order by disorder of the kagome Heisenberg antiferromagnet.

Item Type:Article
Source:Copyright of this article belongs to American Physical Society.
ID Code:103444
Deposited On:09 Mar 2018 11:29
Last Modified:09 Mar 2018 11:29

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