Fennell, T;
Harris, MJ;
Calder, S;
Ruminy, M;
Boehm, M;
Steffens, P;
Lemée-Cailleau, MH;
... Bramwell, ST; + view all
(2019)
Multiple Coulomb phase in the fluoride pyrochlore CsNiCrF6.
Nature Physics
, 15
pp. 60-66.
10.1038/s41567-018-0309-3.
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Abstract
The Coulomb phase is an idealized state of matter whose properties are determined by factors beyond conventional considerations of symmetry, including global topology, conservation laws and emergent order. Theoretically, Coulomb phases occur in ice-type systems such as water ice and spin ice; in dimer models; and in certain spin liquids. However, apart from ice-type systems, more general experimental examples are very scarce. Here we study the partly disordered material CsNiCrF6 and show that this material is a multiple Coulomb phase with signature correlations in three degrees of freedom: charge configurations, atom displacements and spin configurations. We use neutron and X-ray scattering to separate these correlations and to determine the magnetic excitation spectrum. Our results show how the structural and magnetic properties of apparently disordered materials may inherit, and be dictated by, a hidden symmetry—the local gauge symmetry of an underlying Coulomb phase.
| Type: | Article |
|---|---|
| Title: | Multiple Coulomb phase in the fluoride pyrochlore CsNiCrF6 |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1038/s41567-018-0309-3 |
| Publisher version: | http://doi.org/10.1038/s41567-018-0309-3 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10062071 |
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