Graphene 9 Electronic structure 7 Electronic.structure 6 Transition metals 6 Density functional theory 5 Monolayers 5 Topology 5 Bilayer Graphene 4 Calculations 4 Dynamics 4 Electric fields 4 Excitons 4 Ground state 4 Quantum chemistry 4 A: semiconductors 3 Computation theory 3 Crystal structure 3 Electric insulators 3 Harmonic generation 3 Hermitians 3 Magnetic fields 3 Magnetic-field 3 Majorana 3 Mean field theory 3 Nonlinear optics 3 Quantum entanglement 3 Semiconductor alloys 3 Spectra's 3 Spin-orbit couplings 3 Transition metal dichalcogenides (TMD) 3