Entanglement spectra of superconductivity ground states on the honeycomb lattice
Institute for Theoretical Physics, University of Regensburg,
a e-mail: firstname.lastname@example.org
Received in final form: 20 September 2017
Published online: 11 December 2017
We analytically evaluate the entanglement spectra of the superconductivity states in graphene, primarily focusing on the s-wave and chiral dx2-y2 + idxy superconductivity states. We demonstrate that the topology of the entanglement Hamiltonian can differ from that of the subsystem Hamiltonian. In particular, the topological properties of the entanglement Hamiltonian of the chiral dx2-y2 + idxy superconductivity state obtained by tracing out one spin direction clearly differ from those of the time-reversal invariant Hamiltonian of noninteracting fermions on the honeycomb lattice.
Key words: Solid State and Materials
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag 2017