• jopepa@lemmy.world
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      1 year ago

      Very small rocks … with some kind of tiny furnace, bitty crucible, and naturally a wee glass blower.

  • galilette
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    1 year ago

    “Trapping electrons in a crystal” is such a nonsensical way of conveying the idea of a flat band. Most isolated crystals trap all the electrons they have inside of them, or else the world will be full of free roaming electrons!