Coexistence of orbital and quantum critical magnetoresistance in FeSe(1-x)S(x)

This paper studies the magnetoresistance of FeSe1-xSx as a function of sulfur doping, which goes through a quantum critical point characterized by electron nematicity. The experiments show a coexistence of a quadratic and a linear form of the magneto-resistance. These findings suggest that the low-lying electronic excitations in a quantum critical metal may have dual character, one that is coherent and one that is quantum critical