Phase transition to the superconducting state in a strong magnetic field
Feigel'man M.V., Geshkenbein V. B. , Vinokur V. M.
The phase transition from the Abrikosov vortex lattice state to the normal state is shown to be able to split into two transitions. The intermediate vortex liquid phase differs from the normal phase by the presence of screening for current j which flows parallel to the external magnetic field.