  On the basis of the augmented quasiclassical theory of superconductivity with
the Lorentz force, we study the mag- netic field dependence of the charge
distribution due to the Lorentz force in a d-wave vortex lattice with
anisotropic Fermi surfaces. Owing to the competition between the energy-gap and
Fermi surface anisotropies, the charge profile in the vortex lattice changes
dramatically with increasing magnetic field because of the overlaps of each
nearest vortex-core charge. In addition, the accumulated charge in the core
region may reverse its sign as a function of magnetic field. This strong field
dependence of the vortex-core charge cannot be observed in the model with an
isotropic Fermi surface.
