Fig. 2: Spectrum of supercell and temperature distributions for topological edge modes.

a Schematic of the supercell with a boundary between the topological and ordinary unit cells. The supercell consists of 10 units of topological and ordinary states. b Band diagram of the supercell. The blue and red lines denote the topological edge modes. Modes A and B are indicated by magenta and cyan arrows, respectively. The inset shows the enlarged view of the green square. c, d Temperature distributions in the supercell at modes (c) A and (d) B. e, f Heat transfer between the sites for the unit cells O2, O1, T1, and T2 at modes (e) A and (f) B. Green arrows denote the flow direction, and their widths imply the transferred heat quantity between the nearest neighboring sites. Right bottom panels in e and f show the heat balance in each unit cell.