tight binding approximation


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tight binding approximation

[′tīt ¦bīnd·iŋ ə‚präk·sə′mā·shən]
(solid-state physics)
A method of calculating energy states and wave functions of electrons in a solid in which the wave function is assumed to be a sum of pure atomic wave functions centered about each of the atoms in the lattice, each multiplied by a phase factor; it is suitable for deep-lying energy levels.