GAP Band Redux, or Weird Moments in Wikipedia Disambiguation

Look up “GAP Band” on Wikipedia, and you’ll see “Not to be confused with band gap,” beneath the headline.

“Band gap”?? I took the bait:

In solid state physics and related applied fields, the band gap, also called an energy gap or stop band, is a region where a particle or quasiparticle is forbidden from propagating. For insulators and semiconductors, the band gap generally refers to the energy difference between the top of the valence band and the bottom of the conduction band.

Or:

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