A Unified View of Topological Phase Transition in Band Theory
TPT in a trigonal lattice. The parameters used here are ,,,,,, and at lattice constant . The color of dots represents the relative weight of and orbitals. (a) Energy gap and index versus average bond length . A TPT between a NI and a TI is clearly visible. (b) Band structure of the trigonal lattice at the TI phase.
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