Pinch points and Kasteleyn transitions in kagome ice View Full Text


Ontology type: schema:ScholarlyArticle      Open Access: True


Article Info

DATE

2007-06-10

AUTHORS

T. Fennell, S. T. Bramwell, D. F. McMorrow, P. Manuel, A. R. Wildes

ABSTRACT

Complex disordered states—from liquids and glasses to exotic quantum matter—are ubiquitous in nature. Their key properties include finite entropy, power-law correlations and emergent organizing principles. In spin ice, spin correlations are determined by the ‘ice rules’ organizing principle that stabilizes a magnetic state with the same zero-point entropy as water ice. The entropy can be manipulated with great precision by an applied magnetic field: when directed along the three-fold crystallographic axis, the field produces a state of finite entropy, known as kagome ice. Here, we investigate the spin-ice material Ho2Ti2O7 by tilting the magnetic field slightly away from that axis. We thus realize a classic statistical system named after Kasteleyn, in which the entropy of a critical phase can be continuously tuned. Our neutron scattering experiments reveal how this process occurs at a microscopic level. More... »

PAGES

566-572

Identifiers

URI

http://scigraph.springernature.com/pub.10.1038/nphys632

DOI

http://dx.doi.org/10.1038/nphys632

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1002988224


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