Pb concentration alone sets the bulk gap and topological transition in Mn1-xPbx(Bi1-ySby)2Te4 while Pb/Sb ratio independently sets the Dirac point position.
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Tuning topological phase and Dirac point position via Pb and Sb substitution in Mn$_{1-x}$Pb$_{x}$(Bi$_{1-y}$Sb$_{y}$)$_{2}$Te$_{4}$
Pb concentration alone sets the bulk gap and topological transition in Mn1-xPbx(Bi1-ySby)2Te4 while Pb/Sb ratio independently sets the Dirac point position.