Dynamic competition between spin-density wave order and superconductivity in underdoped Ba 1− x K x Fe 2 As 2

Whether superconductivity coexists or competes with other types of order in unconventional superconductors is a question that has been hotly contested. An ARPES study reported by Yi et al. suggest that superconductivity and spin-density wave orders coexist and compete dynamically in Ba1−xKxFe2As2.