The electric charge density in the vortex lattice of superconductors is
studied within the Ginzburg-Landau theory. We show that the electrostatic
potential ϕ is proportional to the GL function,
ϕ∝∣ψ∣2−∣ψ∞∣2. Numerical results for the triangular
vortex lattice are presented.Comment: 4 pages with 2 figure