Superconductivity-enhanced Nematicity and '$s+d$' Gap Symmetry in Fe(Se${}_{1-x}$S${}_x$)

Liran Wang, Frédéric Hardy, Thomas Wolf +4

Superconducting iron chalcogenide FeSe has the simplest crystal structure among all the Fe-based superconductors. Unlike other iron pnictides, FeSe exhibits no long range magnetic…