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arXiv · 1706.04004

Jammed spin liquid in the bond-disordered kagome Heisenberg antiferromagnet

Thomas Bilitewski·Mike E. Zhitomirsky·Roderich Moessner
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Abstract

We study a class of disordered continuous classical spin systems including the kagome Heisenberg magnet. While each term in its local Hamiltonian can be independently minimised, we find {\it discrete} degenerate ground states whose number grows exponentially with system size. These states do not exhibit zero-energy `excitations' characteristic of highly frustrated magnets but instead are local minima of the energy landscape, albeit with an anomalously soft excitation spectrum. This represents a spin liquid version of the phenomenon of jamming familiar from granular media and structural glasses. Correlations of this jammed spin liquid, which upon increasing the disorder strength gives way to a conventional spin glass, may be algebraic (Coulomb-type) or exponential.

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Thomas Bilitewski, Mike E. Zhitomirsky, Roderich Moessner. 2017-12-12. Jammed spin liquid in the bond-disordered kagome Heisenberg antiferromagnet. https://doi.org/10.1103/physrevlett.119.247201

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