Dresden 2006 – wissenschaftliches Programm
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TT: Tiefe Temperaturen
TT 7: Superconductivity & Solids At Low Temperature - Poster Session
TT 7.28: Poster
Montag, 27. März 2006, 14:00–17:45, P1
Bernoulli potential in type-I and weak type-II superconductors: Electrostatic potential above the vortex lattice — •K. Morawetz1,2, P. Lipavsky3, J. Kolacek4, E.H. Brandt5, and M. Schreiber1 — 1Institute of Physics, Chemnitz University of Technology, 09107 Chemnitz, Germany — 2Max-Planck-Institute for the Physics of Complex Systems, Nöthnitzer Str. 38, 01187 Dresden, Germany — 3Faculty of Mathematics and Physics, Charles University, Ke Karlovu 5, 12116 Prague 2 — 4Institute of Physics, Academy of Sciences, Cukrovarnická 10, 16253 Prague 6, Czech Republic — 5Max-Planck-Institute for Metal Research, 70506 Stuttgart, Germany
The electrostatic potential above the Abrikosov vortex lattice, is evaluated within the Ginzburg-Landau theory. Unlike previous studies we include the surface dipole. Close to the critical temperature, the surface dipole reduces the electrostatic potential to values below sensitivity of recent sensors. At low temperatures the surface dipole is less effective and the electrostatic potential remains observable as predicted earlier. We propose an experimental measurement by NMR to access this field which can yield informations about material parameters.
[1] P. Lipavský, K. Morawetz, J. Kolacek, J. J. Mares, E. H. Brandt, M. Schreiber, Bernoulli potential in type-I and weak type-II supercoductors: III. Electrostatic potential above the vortex lattice Phys. Rev. B 71 (2005) 024526-1-7, II. Surface dipole, Phys. Rev. B 70 (2004) 104518-1-7, I. Surface charge, Phys. Rev. B 69 (2004) 024524-1-7