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Quantum states and vortex patterns in nanosuperconductors
Author(s) -
Deloof Bart,
Moshchalkov Victor V.,
Chibotaru Liviu F.
Publication year - 2013
Publication title -
annalen der physik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.009
H-Index - 68
eISSN - 1521-3889
pISSN - 0003-3804
DOI - 10.1002/andp.201300111
Subject(s) - vortex , vorticity , physics , condensed matter physics , superconductivity , quantum , symmetry (geometry) , domain (mathematical analysis) , nanoscopic scale , quantum mechanics , mechanics , geometry , mathematical analysis , mathematics
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 T c , 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.