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Er2Ti2O7: Evidence of quantum order by disorder in a frustrated antiferromagnet
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UNSPECIFIED. (2003) Er2Ti2O7: Evidence of quantum order by disorder in a frustrated antiferromagnet. PHYSICAL REVIEW B, 68 (2). -. ISSN 1098-0121
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Official URL: http://dx.doi.org/10.1103/PhysRevB.68.020401
Abstract
Er2Ti2O7 has been suggested to be a realization of the frustrated <111> XY pyrochlore lattice antiferromagnet, for which theory predicts fluctuation-induced symmetry breaking in a highly degenerate ground state manifold. We present a theoretical analysis of the classical model compared to neutron scattering experiments on the real material, both below and above T-N=1.173(2) K. The model correctly predicts the ordered magnetic structure, suggesting that the real system has order stabilized by zero-point quantum fluctuations that can be modeled by classical spin wave theory. However, the model fails to describe the excitations of the system, which show unusual features.
| Item Type: | Journal Article |
|---|---|
| Subjects: | Q Science > QC Physics |
| Journal or Publication Title: | PHYSICAL REVIEW B |
| Publisher: | AMERICAN PHYSICAL SOC |
| ISSN: | 1098-0121 |
| Date: | 1 July 2003 |
| Volume: | 68 |
| Number: | 2 |
| Number of Pages: | 4 |
| Page Range: | - |
| Identification Number: | 10.1103/PhysRevB.68.020401 |
| Publication Status: | Published |
| URI: | http://wrap.warwick.ac.uk/id/eprint/9320 |
Data sourced from Thomson Reuters' Web of Knowledge
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