Dresden 2003 – wissenschaftliches Programm
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TT: Tiefe Temperaturen
TT 20: Postersitzung IV (Mesoskopische Systeme, Supraleitung: Massivmaterialien, Bandleiter, Pinning, Vortexdynamik, Transporteigenschaften, Korngrenzen)
TT 20.34: Poster
Donnerstag, 27. März 2003, 14:30–19:00, P2c, P2d
Electrodynamic potential in a superconductor — •Klaus Morawetz1, Pavel Lipavský2, Jan Koláček2, and Ernst Helmut Brandt3 — 1Max-Planck-Institute for the Physics of Complex Systems, Noethnitzer Str. 38, 01187 Dresden, Germany — 2Institute of Physics, Academy of Sciences, Cukrovarnická 10, 16258 Praha 6, Czech Republic — 3Max-Planck-Institut für Metallforschung, D-70506 Stuttgart, Germany
The electrodynamical potential in a superconductor is studied. To this end Bardeen’s extension of the Ginzburg-Landau theory to low temperatures by the two-fluid model of Gorter-Casimir is used to derive three Ginzburg-Landau equations, the Maxwell equation for the vector potential, the Schroedinger equation for the wave function and the Poisson equation for the electrostatic potential. The electrostatic and the thermodynamic potential compensate each other to a great extent resulting into an effective potential acting on the superconducting condensate. For the Abrikosov vortex lattice numerical solutions are presented and the different contributions to the electrostatic potential and the related charge distribution are discussed. Specifically used parameters are presented for Niobium.
[1] P. Lipavský, J. Koláček, K. Morawetz and E. H. Brandt, Phys. Rev. B 65, 144511 (2002), Phys. Rev. B 66, 134525 (2002)