Random-walk studies of excitation trapping in crystals
β Scribed by G. Zumofen; A. Blumen
- Publisher
- Elsevier Science
- Year
- 1982
- Tongue
- English
- Weight
- 434 KB
- Volume
- 88
- Category
- Article
- ISSN
- 0009-2614
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β¦ Synopsis
We mvestigate energy trapping in regular crystals of different dimcnsional~t~es, assummg a nearest-neighbor random walk of the excitation and quenching at fust trap encounter.
From numerical simulations we determine the number of dtfferent ales vtslted, and exact and approximate survival probabtities, theu behavior changes drasttally with the larttcc dimenslon-aMy.
π SIMILAR VOLUMES
We study the survival probability of a particle that performs a random walk in a medium with traps where the trapping strength V is distributed randomly. We use an approach which is asymptotically exact and brings Wn(s), the number of distinct sites s visited after n steps, into play. Particularly i
Following pulsed irradiation of disordered solids, optical absorption of trapped electrons decays in the far red and increases in the visible. The random-walk model of Scher and Control, quantitatively apphcable to electron mobility by timeof-flight, supports hopping to successively deeper traps. Ba