Jt. Devreese et al., SUPERCONDUCTING MESOSCOPIC SQUARE LOOPS - PHASE BOUNDARIES AND MAGNETIZATION, PHYSICS OF LOW-DIMENSIONAL STRUCTURES, 1-2, 1998, pp. 33-38
For a superconducting mesoscopic square loop of intermediate size, com
parable with the coherence length and with the penetration depth, the
superconducting state is described and the phase boundaries are analyz
ed on the basis of a self-consistent solution of the Ginzburg-Landau e
quations. As a heuristic criterion for the phase boundary, the appeara
nce of a ''superconducting path'' between the links of the leads with
the loop is proposed in fair agreement with experiment. The magnetizat
ion, deduced for states away from the phase boundary, reveals a quasi-
oscillating behaviour. as a function of the applied magnetic field.