Evidence of one-dimensional magnetic heat transport in the triangular-lattice antiferromagnet Cs${}_2$CuCl${}_4$

Abstract

We report on low-temperature heat-transport properties of the spin-1/2 triangular-lattice antiferromagnet Cs${}_2$CuCl${}_4$. Broad maxima in the thermal conductivity along the three principal axes, observed at about 5 K, are interpreted in terms of the Debye model, including the phonon Umklapp scattering. For thermal transport along the $b$ axis, we observed a pronounced field-dependent anomaly, close to the transition into the three-dimensional long-range-ordered state. No such anomalies were found for the transport along the $a$ and $c$ directions. We argue that this anisotropic behavior is related to an additional heat-transport channel through magnetic excitations, that can best propagate along the direction of the largest exchange interaction. Besides, peculiarities of the heat transport of Cs${}_2$CuCl${}_4$ in magnetic fields up to the saturation field and above are discussed.

References in corpus (22)

• Spin-lattice coupling in frustrated antiferromagnets
• Experimental realization of a 2D fractional quantum spin liquid
• Observation of extended scattering continua characteristic of spin fractionalization in the 2D frustrated quantum magnet Cs2CuCl4 by neutron scattering
• Unusual ordered phases of highly frustrated magnets: a review
• Direct Measurement of the Spin Hamiltonian and Observation of Condensation of Magnons in the 2D Frustrated Quantum Magnet Cs2CuCl4
• Heat transport by lattice and spin excitations in the spin chain compounds SrCuO_2 and Sr_2CuO_3
• Spinons and triplons in spatially anisotropic frustrated antiferromagnets
• Thermal conductivity and specific heat of the linear chain cuprate Sr${}_2$CuO${}_3$: Evidence for thermal transport via spinons
• Magnetothermal transport in the spin-1/2 chains of copper pyrazine dinitrate
• Magnetic phase transitions in the two-dimensional frustrated quantum antiferromagnet Cs2CuCl4
• Modes of magnetic resonance in the spin liquid phase of Cs2CuCl4
• Direct determination of exchange parameters in Cs2CuBr4 and Cs2CuCl4: high-field ESR studies
• Magnetic heat conductivity in $\mathbf{CaC}{\mathbf{u}}_2{\mathbf{O}}_3$: linear temperature dependence
• Pressure-tuning the quantum spin Hamiltonian of the triangular lattice antiferromagnet Cs${}_2$CuCl${}_4$
• New physics in frustrated magnets: Spin ices, monopoles, etc
• Heat transport of cuprate-based low-dimensional quantum magnets with strong exchange coupling
• Phases of triangular lattice antiferromagnet near saturation
• Magnetic resonance in the ordered phases of the 2D frustrated quantum magnet Cs2CuCl4
• Quasiparticles of spatially anisotropic triangular antiferromagnets in a magnetic field
• Majorana spin liquid and dimensional reduction in Cs2CuCl4
• Elastic constants and ultrasound attenuation in the spin-liquid phase of Cs${}_2$CuCl${}_4$
• Many-body theory of magneto-elasticity in one dimension

Cited by in corpus (4)

• Unconventional dual 1D-2D quantum spin liquid revealed by $ab$ $initio$ studies on organic solids family
• Magnetization plateaux cascade in the frustrated quantum antiferromagnet Cs${}_2$CoBr${}_4$
• Frustration, ring exchange, and the absence of long-range order in EtMe${}_3$Sb[Pd(dmit)${}_2$]${}_2$: from first principles to many-body theory
• Dimensional reduction and incommensurate dynamic correlations in the $S=\frac{1}{2}$ triangular-lattice antiferromagnet Ca${}_3$ReO${}_5$Cl${}_2$