Unexpected low thermal conductivity and large power factor in Dirac semimetal Cd<sub>3</sub>As<sub>2</sub>

Unexpected low thermal conductivity and large power factor in Dirac semimetal Cd₃As₂

Zhang Cheng^{1, 2}, Zhou Tong^{1, 2, 3}, Liang Sihang^{1, 2}, Cao Junzhi^{1, 2}, Yuan Xiang^{1, 2}, Liu Yanwen^{1, 2}, Shen Yao^{1, 2}, Wang Qisi^{1, 2}, Zhao Jun^{1, 2}, Yang Zhongqin^{1, 2, 3}, Xiu Faxian^{1, 2, †,}

Crystal structure and band structure of Cd₃As₂. (a) Crystal structure of Cd₃As₂with a distorted superstructure of the antifluorite (M₂X) structure type with anI4_1/acdspace group. The red and green balls represent Cd and As atoms, respectively. (b) XRD of the single crystal Cd₃As₂with a (112) crystal surface. (c) The calculated band structures for Cd₃As₂, showing a semimetal structure.