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Article Dans Une Revue Physical Review B: Condensed Matter and Materials Physics (1998-2015) Année : 2011

Resonating color state and emergent chromodynamics in the kagome antiferromagnet

Résumé

We argue that the spin-wave breakdown in the Heisenberg kagome antiferromagnet signals an instability of the ground state and leads, through an emergent local constraint, to a quantum dynamics described by a gauge theory similar to that of chromodynamics. For integer spins, we show that the quantum fluctuations of the gauge modes select the sqrt(3)xsqrt(3) Neel state with an on-site moment renormalized by color resonances. We find non-magnetic low-energy excitations that may be responsible for a deconfinement "transition" at experimentally accessible temperatures which we estimate.

Dates et versions

hal-00587008 , version 1 (19-04-2011)

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Olivier Cepas, Arnaud Ralko. Resonating color state and emergent chromodynamics in the kagome antiferromagnet. Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2011, 84, pp.020413(R). ⟨10.1103/PhysRevB.84.020413⟩. ⟨hal-00587008⟩

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