Fig. 5.

Lattice thermal conductivity. a Calculated lattice thermal conductivity of Mg₃Sb₂, CaZn₂Sb₂, and SnS₂ along a and c directions as a function of temperature. The inset table displays the average Grüneisen parameters at room temperature along a and c directions. b Anisotropy of lattice thermal conductivity κ_a/κ_c at 300 K as a function of the intralayer-to-interlayer bond-strength ratio ρ_intra/ρ_inter. ρ_intra and ρ_inter represent the electron density values at BCPs of the intralayer and interlayer bonds, respectively. The theoretical lattice thermal conductivity data of MoSe₂ and MoS₂ are adapted from ref. ³. The dashed line is a guide to the eyes