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Understanding superconductivity requires detailed knowledge of the normalelectronic state from which it emerges. A nematic electronic state that breaksthe rotational symmetry of the lattice can potentially promote uniquescattering relevant for superconductivity. Here, we investigate the normaltransport of superconducting FeSe$_{1-x}$S$_x$ across a nematic phasetransition using high magnetic fields up to 69 T to establish the temperatureand field-dependencies. We find that the nematic state is an anomalousnon-Fermi liquid, dominated by a linear resistivity at low temperatures thatcan transform into a Fermi liquid, depending on the composition $x$ and theimpurity level. Near the nematic end point, we find an extended temperatureregime with $T^{1.5}$ resistivity. The transverse magnetoresistance inside thenematic phase has as a $H^{1.55}$ dependence over a large magnetic field rangeand it displays an unusual peak at low temperatures inside the nematic phase.Our study reveals anomalous transport inside the nematic phase, driven by thesubtle interplay between the changes in the electronic structure of amulti-band system and the unusual scattering processes affected by largemagnetic fields and disorder

Anomalous high-magnetic field electronic state of the nematic superconductors FeSe$_{1-x}$S$_x$