Fig. 4: Topological phase transition of in Pb1-xSnxTe alloys.
From: Dimensional transport crossovers in thermoelectrics revealed by a simple transport model
a Relationship between \(S\) and \(n\) at \(T=300\,{{{\rm{K}}}}\), compiled from Refs. 52,53,54,55,56,57,58,59,60. At the critical composition \({x}_{c}\approx 0.6\), the alloy exhibits unexpected 1D-like transport behavior (\(S\propto {n}^{-2}\)), distinctly deviating from the typical 3D transport characterized by \(S\propto {n}^{-2/3}\). b Effective mass (\({m}^{ * }/{m}_{e}\)) as a function of \(n\), highlighting a dramatic decrease (approximately three orders of magnitude) in effective mass precisely at the critical composition.
