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Band inversion is a key ingredient of a topologically nontrivial material$^1$. What is band inversion? How to recognize it in a band structure? What conclusions can I infer if I observe band inversion in a material?

References

  1. Zhiyong Zhu, Yingchun Cheng, and Udo Schwingenschlögl. "Band inversion mechanism in topological insulators: A guideline for materials design." Physical Review B 85 235401 (2012).
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