The dynamics of photoinduced defect creation in amorphous chalcogenides: The origin of the stretched exponential function

Journal Article · Tue Jan 07 00:00:00 EST 2014 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4861143· OSTI ID:22271282

Freitas, R. J. ^[1]; Shimakawa, K. ^[2]; Wagner, T. ^[2]

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1. Department of Electrical and Electronic Engineering, National University of Timor Lorosa'e, Av. Cidade de Lisboa, Dili, East Timor (Portugal)
2. Department of General and Inorganic Chemistry, University of Pardubice, Pardubice 53002 (Czech Republic)

The article discusses the dynamics of photoinduced defect creations (PDC) in amorphous chalcogenides, which is described by the stretched exponential function (SEF), while the well known photodarkening (PD) and photoinduced volume expansion (PVE) are governed only by the exponential function. It is shown that the exponential distribution of the thermal activation barrier produces the SEF in PDC, suggesting that thermal energy, as well as photon energy, is incorporated in PDC mechanisms. The differences in dynamics among three major photoinduced effects (PD, PVE, and PDC) in amorphous chalcogenides are now well understood.

• OSTI ID: 22271282
• Journal Information: Journal of Applied Physics, Vol. 115, Issue 1; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
AMORPHOUS STATE
CHALCOGENIDES
CRYSTAL DEFECTS
IRRADIATION
PHOTONS
THERMAL EXPANSION