Fig. 3: Further suppression of κ by out-of-plane magnetic fields.
From: Phonon thermal transport shaped by strong spin-phonon scattering in a Kitaev material Na2Co2TeO6
a The in-plane κ of Sample#3 under out-of-plane magnetic fields. The geometry is sketched in the inset. ∇T is along the armchair direction, and B is perpendicular to the honeycomb plane. A rapid field suppression of κ/T is recognized at finite temperatures below about 3 T. At higher fields, the κ/T(T) curves changes nonmonotonically in a narrow range. b The κ/T(B) profiles at three representative temperatures. They clearly show a fast drop at field 2 T < B < 4 T, followed by an oscillation-like feature at higher fields. As highlighted in the inset, the oscillation profiles change little with temperature.
