Extended Data Fig. 6: Field dependence of κzz and κzy in La2CuO4 and Nd-LSCO.

Upper panels: thermal conductivity κzz measured at H = 0 T (purple), 10 T (green) and 15 T (red), plotted as κzz / T vs T, for a) La2CuO4, b) Nd-LSCO with p = 0.21 and c) Nd-LSCO with p = 0.24. Lower panels: thermal Hall conductivity κzy measured at H = 10 T (purple) and 15 T (red), plotted as κzy / (T H) vs T, for d) La2CuO4, e) Nd-LSCO with p = 0.21 and f) Nd-LSCO with p = 0.24. We see that κzy is approximately linear in H.