Fig. 1
From: Phase transitions, Dirac and Weyl semimetal states in Mn1−xGexBi2Te4
(a1–a8) ARPES data for \(\textrm{Mn}_{1-x} \textrm{Ge}_x \textrm{Bi}_2 \textrm{Te}_4\) with Ge concentrations ranging from 12 to 90%, measured using a He lamp (\(h\nu = 21.2\) eV). White lines represent EDCs at the \(\bar{\Gamma }\)-point. (b) Dependence of the band gap on Ge concentration, shown as the distance between peaks in the EDCs (solid line with dots) and the non-zero signal intensity between peaks for concentrations from 47% to 60% (dashed line with crosses). (c1–c3) Detailed view of the band dispersions near DP for Ge concentrations of 47%, 51%, and 60%.
