Extended Data Fig. 2: Longitudinal thermal conductivities κxx and κzz in La2CuO4. | Nature Physics

Extended Data Fig. 2: Longitudinal thermal conductivities κxx and κzz in La2CuO4.

From: Chiral phonons in the pseudogap phase of cuprates

Extended Data Fig. 2

Thermal conductivity versus temperature in a field of magnitude H = 15 T for La2CuO4 (p = 0), plotted as a) κnn vs T and b) κnn / T vs T, for heat current directions J // a (n = x; blue) and J // c (n = z; red). The longitudinal thermal conductivity of phonons at low temperature is nearly isotropic, with κxx / κzz = κa / κc ~ 0.8 at T = 25 K.

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