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arXiv · 1405.3092

Thermal Conductivity due to Spinons in the One-Dimensional Quantum Spin System Sr2V3O9

Takayuki Kawamata·Masanori Uesaka·Mitsuhide Sato·Koki Naruse·Kazutaka Kudo·Norio Kobayashi·Yoji Koike
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Abstract

We have measured the thermal conductivity along different directions of the S = 1/2 one-dimensional (1D) spin system Sr2V3O9 in magnetic fields up to 14 T. It has been found that the thermal conductivity along the [10-1] direction, \k{appa}[10-1], is large and markedly suppressed by the application of magnetic field, indicating that there is a large contribution of spinons to \k{appa}[10-1] and that the spin chains run along the [10-1] direction. The maximum value of the thermal conductivity due to spinons is ~14 W/Km along the [10-1] direction, supporting the empirical law that the magnitude of the thermal conductivity due to spinons is roughly proportional to the antiferromagnetic interaction between the nearest neighboring spins.

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Takayuki Kawamata, Masanori Uesaka, Mitsuhide Sato, Koki Naruse, Kazutaka Kudo, Norio Kobayashi, Yoji Koike. 2014-05-13. Thermal Conductivity due to Spinons in the One-Dimensional Quantum Spin System Sr2V3O9. https://doi.org/10.7566/jpsj.83.054601

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