Striking evidence for a fundamental covalent-ionic transition in the electronic nature of solids is presented.
DOI:https://doi.org/10.1103/PhysRevLett.22.1433
©1969 American Physical Society
S. Kurtin, T. C. McGill, and C. A. Mead
Vol. 22, Iss. 26 — 30 June 1969
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