I have a monolayer semimetal with a nodal loop around Gamma point. The Chern number is 1 because this closed loop. I want to increase the Chern number without additional layer(s). In some papers, I found that the higher Chern number can be achieved in materials with some Weyl or Dirac point (not a nodal loop). Do you have any idea how to break the nodal loop to become points?
