Thermal conductivity of quantum magnetic monopoles in the frustrated pyrochlore Yb2Ti2O7

Abstract

We report low-temperature thermal conductivity $\kappa$ of pyrochlore Yb${}_2$Ti${}_2$O${}_7$, which contains frustrated spin-ice correlations with significant quantum fluctuations. In the disordered spin-liquid regime, $\kappa (H)$ exhibits a nonmonotonic magnetic field dependence, which is well explained by the strong spin-phonon scattering and quantum monopole excitations. We show that the excitation energy of quantum monopoles is strongly suppressed from that of dispersionless classical monopoles. Moreover, in stark contrast to the diffusive classical monopoles, the quantum monopoles have a very long mean free path. We infer that the quantum monopole is a novel heavy particle, presumably boson, which is highly mobile in a three-dimensional spin liquid.

8 pages, 9 figures

References in corpus (11)

• Pyrochlore Photons: The U(1) Spin Liquid in a S=1/2 Three-Dimensional Frustrated Magnet
• Dirac Strings and Magnetic Monopoles in Spin Ice Dy2Ti2O7
• U(1) Gauge Theory of the Hubbard Model : Spin Liquid States and Possible Application to k-(BEDT-TTF)_2 Cu_2 (CN)_3
• Thermal Hall conductivity in the frustrated pyrochlore magnet Tb2Ti2O7
• Amperean Pairing Instability in the U(1) Spin Liquid State with Fermi Surface and Application to $\kappa -(BEDT-TTF{)}_{2}C{u}_2(CN{)}_3$
• Is the Yb2Ti2O7 pyrochlore a quantum spin ice?
• Novel Pauli-paramagnetic quantum phase in a Mott insulator
• Spin Bose-Metal and Valence Bond Solid phases in a spin-1/2 model with ring exchanges on a four-leg triangular ladder
• A Measure of Monopole Inertia in the Quantum Spin Ice Yb${}_2$Ti${}_2$O${}_7$
• Bosonic Many-body Theory of Quantum Spin Ice
• Gapless Spin Liquids: Stability and Possible Experimental Relevance

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