Journal article · Preprint article
Er2Ti2O7: Evidence of quantum order by disorder in a frustrated antiferromagnet
Er(2)Ti(2)O(7) 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.
Language: | English |
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Year: | 2003 |
Pages: | 4 |
ISSN: | 1550235x , 10980121 and 01631829 |
Types: | Journal article and Preprint article |
DOI: | 10.1103/PhysRevB.68.020401 |