Low-temperature formation of Fe<sup>3+</sup>centres in silver chloride

Laredo, E.; Paul, W. B.; Rowan, L. G.; Slifkin, Lawrence

doi:10.1088/0022-3719/16/7/003

Cited by 6 publications

(1 citation statement)

References 9 publications

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“…To address the question as to how, at low temperatures, this centre acquires the extra vacancy necessary to its production, Laredo et al [10] monitored the EPR spectra produced by irradiating AgCl:Fe 2+ , Pd 2+ with band-gap light, at temperatures ranging from 4.5 to 220 K. The Pd 2+ acts as a deep trap for photoelectrons, thereby preventing recombination with holes.…”

Section: Formation Of the Interstitial Ferric Defectsmentioning

confidence: 99%

Dynamics of self-trapped hole processes in AgCl

Slifkin

2001

J. Phys.: Condens. Matter

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A set of phenomena involving the self-trapped hole (STH) in AgCl have been studied in crystals doped with hole sources, traps for holes and electrons and providers of cation vacancies. An energy barrier was demonstrated in the self-trapping process; its energy was related to appropriate phonon energies, and tunnelling appeared in the temperature range predicted by Mott and Stoneham. Migration of the STH can occur either by phonon-assisted hopping or by tunnelling. From the temperature dependences, one obtains the activation energy (0.062 eV), the trap depth (0.12 eV) and the temperature exponent for quantum migration (1.3). The structures and energetics of two centres involving an STH bound to a vacancy have been deduced. Also, it was shown that low-temperature capture of a hole by substitutional Fe2+ causes production of a Frenkel pair, as well as ultimately leading to formation of the (interstitial Fe3+) - (multivacancy) defect that was first characterized by Hayes et al.

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Section: Formation Of the Interstitial Ferric Defectsmentioning

confidence: 99%