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Thermal conductivity of geometrically frustrated, ferroelectric YMnO3: Extraordinary spin-phonon interactions
- Authors
- Sharma, Peter Anand; Ahn, Jai-seok; Hur, Namjung; Park,Soonyong; Kim, Sung Baek; Lee, Seongsu; Park, Je-geun; Guha, Sabyasachi; Cheong, Sang-Wook
- Issue Date
- Oct-2004
- Publisher
- AMER PHYSICAL SOC
- Citation
- PHYSICAL REVIEW LETTERS, v.93, no.17
- Journal Title
- PHYSICAL REVIEW LETTERS
- Volume
- 93
- Number
- 17
- ISSN
- 0031-9007
1079-7114
- Abstract
- The thermal conductivity of the magnetically frustrated, ferroelectric YMnO3 exhibits an isotropic suppression in the cooperative paramagnetic state, followed by a sudden increase upon magnetic ordering. This unprecedented behavior without an associated static structural distortion probably originates from the strong dynamic coupling between acoustic phonons and low-energy spin fluctuations in geometrically frustrated magnets. The replacement of magnetic Ho for Y at the ferroelectrically active site results in an even larger effect, suggestive of the strong influence of multiferroicity.
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Collections - College of Natural Sciences > Department of Physics > 1. Journal Articles
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