Fig. 1
From: Ultra-low thermal conductivity of two-dimensional phononic crystals in the incoherent regime
Schematic illustration of hexagonal-lattice Si PnCs. In our work, the thickness of 2D PnCs is fixed at 100 nm. The heat flux is along x direction. The neck size in our research is from 10 to 30 nm, and the pitch size is from 60 to 90 nm
