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Dimensional Reduction in Quantum Dipolar Antiferromagnets

Type of publication Peer-reviewed
Publikationsform Original article (peer-reviewed)
Author Babkevich P., Jeong M., Matsumoto Y., Kovacevic I., Finco A., Toft-Petersen R., Ritter C., Mansson M., Nakatsuji S., Ronnow H. M.,
Project Mott Physics Beyond the Heisenberg Model in Iridates and Related Materials
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Original article (peer-reviewed)

Journal PHYSICAL REVIEW LETTERS
Volume (Issue) 116(19)
Page(s) 197202
Title of proceedings PHYSICAL REVIEW LETTERS
DOI 10.1103/physrevlett.116.197202

Open Access

URL https://infoscience.epfl.ch/record/219691?ln=en
Type of Open Access Repository (Green Open Access)

Abstract

We report ac susceptibility, specific heat, and neutron scattering measurements on a dipolar-coupled antiferromagnet LiYbF4. For the thermal transition, the order-parameter critical exponent is found to be 0.20(1) and the specific-heat critical exponent -0.25(1). The exponents agree with the 2D XY/h(4) universality class despite the lack of apparent two-dimensionality in the structure. The order-parameter exponent for the quantum phase transitions is found to be 0.35(1) corresponding to (2 + 1)D. These results are in line with those found for LiErF4 which has the same crystal structure, but largely different T-N, crystal field environment and hyperfine interactions. Our results therefore experimentally establish that the dimensional reduction is universal to quantum dipolar antiferromagnets on a distorted diamond lattice.
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