Band Center—A Conserved Quantity in Solids
- 1 February 1982
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 48 (5) , 359-362
- https://doi.org/10.1103/physrevlett.48.359
Abstract
The average positions of different bands in a solid are shown to be equal to the symmetry centers of the space group of the solid. These positions turn out to be eigenvalues of a band-center operator which is a conserved quantity for translationally invariant systems.Keywords
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