Spinon localization in the heat transport of the spin-1/2 ladder compound (C${}_5$H${}_{12}$N)${}_2$CuBr${}_4$

Abstract

We present experiments on the magnetic field-dependent thermal transport in the spin-1/2 ladder system (C${}_5$H${}_{12}$N)${}_2$CuBr${}_4$. The thermal conductivity $\kappa (B)$ is only weakly affected by the field-induced transitions between the gapless Luttinger-liquid state realized for $B_{c1}<B<B_{c2}$ and the gapped states, suggesting the absence of a direct contribution of the spin excitations to the heat transport. We observe, however, that the thermal conductivity is strongly suppressed by the magnetic field deeply within the Luttinger-liquid state. These surprising observations are discussed in terms of localization of spinons within finite ladder segments and spinon-phonon umklapp scattering of the predominantly phononic heat transport.

4 pages, 3 figures

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Cited by in corpus (14)

• Heat transport of cuprate-based low-dimensional quantum magnets with strong exchange coupling
• Anisotropy of Magnetic Interactions in the Spin-Ladder Compound (C${}_5$H${}_{12}$N)${}_2$CuBr${}_4$
• Proposal for measuring the finite-temperature Drude weight of integrable systems
• Heat transport of the quasi-one-dimensional alternating spin chain material (CH_{3})_{2}NH_{2}CuCl_{3}
• Effective S=1/2 description of the S=1 chain with strong easy plane anisotropy
• Field-dependent spin and heat conductivities of dimerized spin-1/2 chains
• Magnetic field induced bound states in spin-$\frac{1}{2}$ ladders
• Electronic structure and magnetic properties of the strong-rung spin-1 ladder compound Rb${}_3$Ni${}_2$(NO${}_3$)${}_7$
• Thermodynamics of the spin-1/2 two-leg ladder compound $(C_5{H}_{12}N{)}_{2}CuB{r}_4$
• Helical quantum Hall Edge modes in bilayer graphene: a realization of quantum spin-ladders
• Light induced magnetization in a spin S=1 easy-plane antiferromagnetic chain
• Large magnetic thermal conductivity induced by frustration in low-dimensional quantum magnets
• Magnetothermal Transport in Spin-Ladder Systems
• Low-temperature thermal conductivity of antiferromagnetic S = 1/2 chain material CuCl_2$\cdot$2((CH_3)_2SO)