Gap opening in the spectrum of some Dirac-like pseudo-differential operators
Gap opening in the spectrum of some Dirac-like pseudo-differential operators
In this paper, we study the opening of a spectral gap for a class of 2-dimensional periodic Hamiltonians which include those modelling multilayer graphene. The kinetic part of the Hamiltonian is given by σ · F (−i∇), where σ denotes the Pauli matrices and F is a sufficiently regular vector-valued …