Fig. 4: The giant isotopic magneto-thermal conductivity and anisotropic magneto-specific heat in Pr₂Ir₂O₇.

a The thermal conductivities of Pr₂Ir₂O₇ single crystal in magnetic fields H // [111] and H ⊥ Q (empty symbols) are compared with those in H ⊥ [111] and H ⊥ Q (filled symbols), where Q is the heat current. b They are also compared with those in H ⊥ [111] and H // Q (half-filled symbols). The schematic illustrations of these three geometries are also shown. The overlap of these curves in all three field directions show that the MTCs are isotropic. c The specific heats of Pr₂Ir₂O₇ in magnetic fields H // [111] (empty symbols) are also compared with those in H ⊥ [111] (filled symbols). Contrary to the magneto-thermal conductivities, anisotropy of magneto-specific heats is clearly seen in these two field directions.