Low-temperature heat transport of the layered spin-dimer compound Ba_3Mn_2O_8

Abstract

We report the study on the low-temperature heat transport of Ba_3Mn_2O_8 single crystal, a layered spin-dimer compound exhibiting the magnetic-field-induced magnetic order or the magnon Bose-Einstein condensation. The thermal conductivities (κ) along both the ab plane and the c axis show nearly isotropic dependence on magnetic field, that is, κis strongly suppressed with increasing field, particularly at the critical fields of magnetic phase transitions. These results indicate that the magnetic excitations play a role of scattering phonons and the scattering effect is enhanced when the magnetic field closes the gap in the spin spectrum. In addition, the magnons in the BEC state of this materials do not show notable ability of carrying heat.

6 pages, 6 figures, accepted for publication in Phys. Rev. B

References in corpus (15)

• Bose-Einstein Condensation in Magnetic Insulators
• Quantum magnetism and criticality
• Heat conduction in low-dimensional quantum magnets
• Thermal conductivity via magnetic excitations in spin-chain materials
• Magnetic phase transitions and magnetoelectric coupling of GdFeO_3 single crystals probed by low-temperature heat transport
• Large magnetothermal conductivity of HoMnO_3 single crystals and its relation to the magnetic-field induced transitions of magnetic structure
• Quantum fluctuations and strong mass renormalization in NiCl2-4SC(NH2)2
• Low-Temperature Heat Transport in the Low-Dimensional Quantum Magnet NiCl_{2}-4SC(NH_{2})_{2}
• Asymmetric quintuplet condensation in the frustrated S=1 spin dimer compound Ba3Mn2O8
• Singlet-triplet dispersion reveals additional frustration in the triangular dimer compound Ba${}_3$Mn${}_2$O${}_8$
• Ordered magnetic phases of the frustrated spin-dimer compound Ba3Mn2O8
• Dispersive magnetic excitations in the S=1 antiferromagnet Ba${}_3$Mn${}_2$O${}_8$
• Large magnetothermal conductivity in GdBaCo_{2}O_{5+x} single crystals
• Anisotropic phase diagram of the frustrated spin dimer compound Ba3Mn2O8
• Heat capacity of the site-diluted spin dimer system Ba3(Mn1-xVx)2O8

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• An irreversible magnetic-field dependence of low-temperature heat transport of spin-ice compound Dy_2Ti_2O_7 in a [111] field
• Heat transport of the quasi-one-dimensional alternating spin chain material (CH_{3})_{2}NH_{2}CuCl_{3}
• Thermal conductivity of IPA-CuCl_3: Evidences of ballistic magnon transport and limited applicability of the Bose-Einstein condensation model
• Thermal Conductivity in the Triangular-Lattice Antiferromagnet Ba3CoSb2O9
• Low-temperature heat transport of spin-gapped quantum magnets
• Contrasting magnetothermal conductivity in sibling Co-based honeycomb-lattice antiferromagnets