Volume 50, Number 3, May I 2000
|Page(s)||375 - 381|
|Section||Condensed matter: electronic structure, electrical, magnetic, and optical properties|
|Published online||01 September 2002|
Influence of the paramagnetic effect on the vortex lattice in 2D superconductors
Centre de Physique Théorique et de Modélisation de Bordeaux,
ERS-CNRS 2120 Université Bordeaux I - 33405 Talence Cedex, France
Corresponding author: email@example.com
Accepted: 6 March 2000
In 2D superconductors under a high magnetic field, when the upper critical field is determined by both the orbital and paramagnetic effects, new solutions for the superconducting order parameter, corresponding to higher Landau levels, must be realized. In order to determine the structure of the vortex lattice in the new phases, we derive a modified Ginzburg-Landau functional in the high- limit. Within this model, we show that the stability of the structures depends on a new criterion which replaces the Abrikosov parameter The triangular lattice is not always favored. We calculate the most favorable structures at different temperatures, and we find changes of the symmetry, as well as the transition order.
PACS: 74.60.Ec – Mixed state, critical fields, and surface sheath
© EDP Sciences, 2000
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