
VOLUME 66  ISSUE 7 
PAGE 492

On edge states in superconductor with time inversion symmetry breaking
Volovik G.E.
Superconducting states with different internal topology are discussed for the layered highTc materials. If the time inversion symmetry is broken, the superconductivity is determined not only by the symmetry of the superconducting state, but also by the topology of the ground state. The latter is determined the integervalued momentumspace topological invariant TV. The current carrying boundary between domains with different iV (jV_{2} φ N\) is considered. The current is produced by fermion zero modes, which number per one layer is 2(N2 N\). PACS: 11.27.+d, 74.20.z, 74.80.g

