The electrostatic potential above the Abrikosov vortex lattice, discussed earlier by Blatter { \em et al.} { [}PRL { \bf 77}, 566 (1996){ ]}, 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 a sensitivity of recent sensors. At low temperatures the surface dipole is less effective and the electrostatic potential remains observable as predicted earlier.
Categories: cond-mat.supr-con nucl-th physics.plasm-ph