with Thermal Conductivity

Pr₂Hf₂O₇ (PHO) is a quantum spin ice candidate with a non-Kramers doublet ground state that displays evidence of dynamic spin ice behaviour [1][2]. We report thermal conductivity measurements of single crystal samples of PHO as a function of temperature between 50 mK and 50 K and magnetic field up to 12 T. A combination of high magnetic field measurements and measurements of different sized samples are used to identify the lattice contribution. We interpret our results considering current theoretical predictions for exotic excitations in quantum spin liquids, such as emergent photons, magnetic monopoles and visons [3].

[1] V. K. Anand et al., Phys. Rev. B 94, 144415 (2016).
[2] R. Sibille et al., Phys. Rev. B 94, 024436 (2016).
[3] M. Gingras and P. McClarty, Rep. Prog. Phys. 77, 056501 (2014).