2007/07/31 by T. Yavors’kii, Taras Yavors'kii, Tom Fennell +4 · 9 citations
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Magnetic and transport properties of perovskites and related materials #Physics of Superconductivity and Magnetism #cond-mat.stat-mech
paper · pdf · doi:10.1103/physrevlett.101.037204
published as Phys. Rev. Lett. 101, 037204 (2008) · 4 pages, 2 figures. Conforms to published version. Small amendments compared to version #1. A high resolution version of Figure 1 can be obtained by e-mailing [email protected]
openalex publication_date 2008/07/16 · arxiv created 2008/08/01 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
Dy2Ti2O7 is a geometrically frustrated magnetic material with a strongly correlated spin ice regime that extends from 1 K down to as low as 60 mK. The diffuse elastic neutron scattering intensities in the spin ice regime can be remarkably well described by a phenomenological model of weakly interacting hexagonal spin clusters, as invoked in other geometrically frustrated magnets. We present a highly refined microscopic theory of Dy2Ti2O7 that includes long-range dipolar and exchange interactions to third nearest neighbors and which demonstrates that the clusters are purely fictitious in this material. The seeming emergence of composite spin clusters and their associated scattering pattern is instead an indicator of fine-tuning of ancillary correlations within a strongly correlated state.