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Bart Deloof, Victor V. Moshchalkov and Liviu F. Chibotaru Quantum states and vortex patterns in nanosuperconductors Annalen der Physik 525

Version of Record online: 6 SEP 2013 | DOI: 10.1002/andp.201300111

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The quanum levels and corresponding vortex states in nanoscale superconductors are investigated within generalized Bogolubov-de Gennes theory. For symmetric (square-shaped) samples thermodynamically stable vortex phases form symmetry-consistent patterns and no transition to conventional Abrikosov-like vortex patterns occurs till T=0K for sizes not exceeding 25 nm. For vorticity L = 2 a giant vortex is stabilized at temperatures in the vicinity of Tc, which transforms into a giant antivortex L = −2 and four normal vortices with lowering the temperature. On the other hand, the vortex pattern for vorticity L = 3 corresponds to an antivortex L = −1 and four normal vortices in the whole temperature domain.

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