Fig. 2

Band convergence and nestification. a Schematic diagram of temperature-induced band convergence in PbTe; b Inherent band nestification in elemental tellurium, enabling a large number of effective band valley degeneracy
Band convergence and nestification. a Schematic diagram of temperature-induced band convergence in PbTe; b Inherent band nestification in elemental tellurium, enabling a large number of effective band valley degeneracy