Bovo, L;
Rouleau, CM;
Prabhakaran, D;
Bramwell, ST;
(2019)
Phase transitions in few-monolayer spin ice films.
Nature Communications
, 10
, Article 1219. 10.1038/s41467-019-09187-w.
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Abstract
Vertex models are an important class of statistical mechanical system that admit exact solutions and exotic physics. Applications include water ice, ferro- and antiferro-electrics, spin ice and artificial spin ice. Here we show that it is possible to engineer spin ice films with atomic-layer precision down to the monolayer limit. Specific heat measurements show that these films, which have a fundamentally different symmetry to bulk spin ice, realise systems close to the two-dimensional F-model, with exotic phase transitions on topologicallyconstrained configurational manifolds. Our results show how spin ice thin films can release the celebrated Pauling entropy of spin ice without an anomaly in the specific heat. They also significantly expand the class of vertex models available to experiment.
| Type: | Article |
|---|---|
| Title: | Phase transitions in few-monolayer spin ice films |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1038/s41467-019-09187-w |
| Publisher version: | http://doi.org/10.1038/s41467-019-09187-w |
| 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. |
| Keywords: | Science & Technology, Multidisciplinary Sciences, Science & Technology - Other Topics, MAGNETIC MONOPOLES, COULOMB PHASE, F-MODEL, LATTICE, ENTROPY, FRUSTRATION, SIGNATURE, DYNAMICS |
| 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.ucl.ac.uk/id/eprint/10071133 |
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