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Heat transport of the quasi-one-dimensional alternating spin chain material (CH_{3})_{2}NH_{2}CuCl_{3}
- Source :
- Phys. Rev. B 84, 134429 (2011)
- Publication Year :
- 2011
-
Abstract
- We report a study of the low-temperature heat transport in the quasi-one-dimensional S = 1/2 alternating antiferromagnetic-ferromagnetic chain compound (CH_{3})_{2}NH_{2}CuCl_{3}. Both the temperature and magnetic-field dependencies of thermal conductivity are very complicated, pointing to the important role of spin excitations. It is found that magnetic excitations act mainly as the phonon scatterers in a broad temperature region from 0.3 to 30 K. In magnetic fields, the thermal conductivity show drastic changes, particularly at the field-induced transitions from the low-field N\'{e}el state to the spin-gapped state, the field-induced magnetic ordered state, and the spin polarized state. In high fields, the phonon conductivity is significantly enhanced because of the weakening of spin fluctuations.<br />Comment: 6 pages, 4 figures, accepted for publication in Phys. Rev. B
- Subjects :
- Condensed Matter - Strongly Correlated Electrons
Subjects
Details
- Database :
- arXiv
- Journal :
- Phys. Rev. B 84, 134429 (2011)
- Publication Type :
- Report
- Accession number :
- edsarx.1110.1009
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1103/PhysRevB.84.134429