A spin-liquid with pinch-line singularities on the pyrochlore lattice

The mathematics of gauge theories lies behind many of the most profound advances in physics in the past 200 years, from Maxwell’s theory of electromagnetism to Einstein’s theory of general relativity. More recently it has become clear that gauge theories also emerge in condensed matter, a prime exam...

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Published in:Nature communications 2016-05, Vol.7 (1), p.11572-11572, Article 11572
Main Authors: Benton, Owen, Jaubert, L.D.C., Yan, Han, Shannon, Nic
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Condensed Matter
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Statistical Mechanics
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description The mathematics of gauge theories lies behind many of the most profound advances in physics in the past 200 years, from Maxwell’s theory of electromagnetism to Einstein’s theory of general relativity. More recently it has become clear that gauge theories also emerge in condensed matter, a prime example being the spin-ice materials which host an emergent electromagnetic gauge field. In spin-ice, the underlying gauge structure is revealed by the presence of pinch-point singularities in neutron-scattering measurements. Here we report the discovery of a spin-liquid where the low-temperature physics is naturally described by the fluctuations of a tensor field with a continuous gauge freedom. This gauge structure underpins an unusual form of spin correlations, giving rise to pinch-line singularities: line-like analogues of the pinch points observed in spin-ice. Remarkably, these features may already have been observed in the pyrochlore material Tb 2 Ti 2 O 7 . Neutron scattering measurements of spin-ice materials contain signature pinch-point singularities, demonstrating the existence of an emergent electromagnetic gauge field. Here, the authors propose a system in which correlations manifest in pinch lines, which may have already been observed experimentally.
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subjects 639/766/119/1001
639/766/483/640
Condensed Matter
Humanities and Social Sciences
multidisciplinary
Neutrons
Physics
Science
Science (multidisciplinary)
Statistical Mechanics
title A spin-liquid with pinch-line singularities on the pyrochlore lattice
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