Giant oscillator strength
id:
giant-oscillator-strength-244-1234676
title:
Giant oscillator strength
text:
Giant oscillator strength is inherent in excitons that are weakly bound to impurities or defects in crystals. The spectrum of fundamental absorption of direct-gap semiconductors such as gallium arsenide (GaAs) and cadmium sulfide (CdS) is continuous and corresponds to band-to-band transitions. It begins with transitions at the center of the Brillouin zone, k = 0 . In a perfect crystal, this spectrum is preceded by a hydrogen-like series of the transitions to s-states of Wannier-Mott excitons. In
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wiki
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encyclopedia
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original url:
https://en.wikipedia.org/wiki/Giant_oscillator_strength
date created:
date modified:
2022-07-10T23:05:37Z
main entity:
{"identifier":"Q25325319","url":"https://www.wikidata.org/entity/Q25325319"}
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13
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