  We study reconstruction of the chiral edge states in a magnetic Chern
insulator in the Kondo lattice model on a triangular lattice at 1/4 filling. In
this state, the spin scalar chirality associated with a four-sublattice
noncoplanar magnetic order assures the topological nature characterized by a
nonzero Chern number. Performing a Langevin-based numerical simulation for
finite-size clusters with the open boundary condition in one direction, we
clarify how the magnetic and electronic properties are modulated near the edges
of the system. As a result, we find that the magnetic state near the edges is
reconstructed to develop ferromagnetic spin correlations. At the same time, the
electronic state is also modified and the chiral edge current is enhanced. We
discuss this enhancement from the viewpoint of the electronic band structure
for the gapless edge states.

Strongly Correlated Electrons