Fig. 3: The vortex spectrum and the corresponding real-space wavefunctions in type-II Dirac semimetal.
From: Double Majorana vortex flat bands in the topological Dirac superconductor
a The solid lines show the band structure of Hamiltonian described by Eq. (8). The dashed lines show the band structure of Hamiltonian described by Eq. (8) with Δsc → 0. \({D}_{1,2}^{{\prime} }\) represents the momentum at which the BdG Dirac point appears in the same limit. b The black lines show the energy spectrum with a single vortex as a function of kz when the open boundary conditions apply in x and y directions. The blue lines represent the bulk energy spectrum of Eq. (8) projected to the Γ-Z line. c The Chern number of \({{{\mathcal{H}}}}_{\pm }({{\bf{k}}};{k}_{z})\) as a function of kz. d The real-space wavefunction profile of zero energy state at kz = π/2 with a single vortex. The color bar is in the unit of 10−2. The parameters are set to be \(\{m,t,{t}^{{\prime} },{t}_{z},\eta ,{\lambda }_{1},{\lambda }_{2},\mu ,{\Delta }_{{{\rm{sc}}}}\}=\{-4,-2,1.5,-1,1.8,1.2,2,0.2,0.6\}\).
