  The Kondo effects of an Anderson impurity embedded into a d-wave
superconductor is studied. Within the slave-boson mean-field approach, the
derived Bogoliubov-de Gennes equations are solved via exact diagonalization. We
show that a critical coupling strength, above which the Kondo effect takes
place, exists regardless of whether the band particle-hole symmetry is present
or not. The resonant quasiparticle peaks are found in the local density of
states (LDOS) both directly at the impurity and around its neighbors, which is
in sharp contrast to the case of nonmagnetic unitary impurities, where the LDOS
vanishes on the impurity site.
