Pauling described metallic bonds using resonance. The maximum probability domains in the Kronig-Penney model can show a picture of it. When the walls are opaque (and the band gap is large) the maximum probability domain for an electron pair essentially corresponds to the region between the walls: the electron pairs are localized within two consecutive walls. However, when the walls become transparent (and the band gaps closes), the maximum probability domain can be moved through the system without a significant loss in probability.
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| http://dx.doi.org/10.3390/molecules26071930 | DOI Listing |
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