Semiconductor, topological semimetal, indirect semimetal, and topological Dirac semimetal phases of Ge${}_{1-x}$Sn${}_x$ alloys

H. -S. Lan, S. T. Chang, C. W. Liu

Electronic structures of Ge${}_{1-x}$Sn${}_x$ alloys (0 $\le$ $x$ $\le$ 1) are theoretically studied by nonlocal empirical pseudopotential method. For relaxed Ge${}_{1-x}$Sn${}_x$, a…