The 1957 result opened a mixed state
Abrikosov used Ginzburg–Landau theory to show how type-II superconductors admit magnetic flux through vortices. The order parameter is suppressed near a vortex core and recovers away from it.
Between a lower and an upper critical field, superconductivity and magnetic flux coexist. This explains why certain superconductors can operate in fields much larger than a simple type-I picture suggests.
Flux comes in units fixed by the pair charge
A loop around a vortex constrains the order-parameter phase. The resulting flux scale depends on the charge carried by the condensate. The field profile extends beyond the core, so a vortex is not simply a normal cylindrical hole containing all its flux.
Imaging and bulk response test different parts
A periodic vortex arrangement can be tested through scattering or spatial magnetic probes. Magnetization locates broader field response, while resistance also depends on whether vortices move. A static equilibrium pattern alone does not predict a device’s critical current.
The teaching phase diagram has a defined limit
The critical-field Lab distinguishes flux exclusion, mixed-state flux and the normal state near the transition. It displays a schematic vortex arrangement, not acquired imaging data. The 2003 theory award is distinct from earlier material discoveries and superconducting-gap experiments.