Fluctuations and defects in the spiral state of magnetic superconductors

Abstract

Abstract We want to point out three properties of a magnetic superconductor: (i) The absence of true long-range order in the spiral state leads to the structure functions behaving like (q‖ − q0)η−2 and (q2⊥)η−2 for q⊥=0 and q‖=0, respectively, where q0 is the preferred momentum. The indices η are measured via Bragg-like neutron scattering. (ii) The state is perforated by line-like defects. (iii) Above some critical temperature the defect lines proliferate, thereby destroying the spiral quasi-order.