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band gap

   Also found in: Dictionary/thesaurus, Wikipedia 0.03 sec.
band gap [′band ‚gap]
(solid-state physics)
An energy difference between two allowed bands of electron energy in a metal.
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In LED technology, an electrical charge is passed through different semiconductor materials, and different colored lights are generated by the band gap resulting from the recombining of electrons due to the electric charge.
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153 QA377 Written for researchers and students working with partial differential equations, integral equations and inverse problems, this textbook provides an asymptotic theory for eigenvalue problems that can be applied to band gap structures and the optimal design of photonic and phononic crystals.
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g] is the optical band gap and m determines the type of optical transitions and for direct transitions, m = 1/2 and 2, for indirect transitions m = 2 and 3.
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