Electrons play many roles in solid materials. When they are weakly bound and able to travel--i.e., mobile--they can enable electrical conduction. When they are bound, or "heavy," they can act as insulators. However, in certain solid materials, this behavior can be markedly different, raising questions about how these different types of electrons interact.
Electrons play many roles in solid materials. When they are weakly bound and able to travel--i.e., mobile--they can enable electrical conduction. When they are bound, or "heavy," they can act as insulators. However, in certain solid materials, this behavior can be markedly different, raising questions about how these different types of electrons interact.
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