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how to determine the parity eigenvalues of time-reversal invariant momenta point from first principle calculation when we judge topological insulator?
@NanoPhys You mean something like slater-koster method to build the Hamiltonian directly? But, Is there a way to determine the parity from the first principle data(like Wien2K) directly? From this reference"Nature Physics 5(6): 438-442",according to their description I think they can directly determine the parity .
Is there real materials have Lieb lattice structure?
Thank you very much! Although the question has already been closed.