First-principles calculations show that Born effective charges jump at the topological transition in germanene and jacutingaite, making infrared spectra distinct markers of the two phases.
Complementary screening for quan- tum spin hall insulators in two-dimensional exfoliable materials,
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Infrared markers of topological phase transitions in quantum spin Hall insulators
First-principles calculations show that Born effective charges jump at the topological transition in germanene and jacutingaite, making infrared spectra distinct markers of the two phases.