In situ high-resolution X-ray photoelectron spectroscopy of light-induced changes in As–Se glasses

Jain, Himanshu; Krishnaswami, Sumi; Miller, A. C.; Krečmer, P.; Elliott, S. R.; Vlček, M.

doi:10.1016/s0022-3093(00)00181-2

Cited by 36 publications

(30 citation statements)

References 10 publications

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“…In fact changes in surface composition and oxygen content have already been reported by several authors as in Refs. [18,[29][30][31][32]. The appearance of crystal phases on the glass surface and its similarity with previous studies on As-Se and As-S glasses strongly suggests that the pyramids are particles of As 2 O 3 , which is confirmed by our Raman data.…”

Section: Discussionsupporting

confidence: 90%

Photoinduced effects in AsSP glasses

Santagneli

Messaddeq

Ribeiro

et al. 2009

Physica Status Solidi (b)

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We report the photoinduced effects on the glass composition As2S3 and As29.6P7.4S63 when exposed to UV light. The morphology of the glass surface irradiated at different power densities was investigated by use of optical microscopy and scanning electron microscopy (SEM). A power density dependence on the photoexpansion (PE) and photoablation (PA) is observed. Raman measurement after irradiation shows the formation of AsO bonds in As29.6P7.4S63. Also, the appearance of PO bonds indicate the incorporation of oxygen at the glass surface during the irradiation process.

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Section: Discussionsupporting

confidence: 90%

Photoinduced effects in AsSP glasses

Santagneli

Messaddeq

Ribeiro

et al. 2009

Physica Status Solidi (b)

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“…We used XPS valence band and EXAFS spectra to ascertain that there is no significant fraction of broken bonds left and that there are no coordination defects (like over-or undercoordinated Se atoms) formed in significant concentrations. The similarity in valence band XPS spectra of aged and rejuvenated samples ( figure 7), showing the contribution from 4p lone pair electrons (∼2 eV), 4p bonding states (∼3-5 eV) and 4s electrons (∼11-16 eV) of Se and As [35], is consistent with such a conclusion.…”

Section: Resultssupporting

confidence: 72%

Long-term physical ageing in As–Se glasses with short chalcogen chains

Golovchak

Shpotyuk

Kozdraś

et al. 2008

J. Phys.: Condens. Matter

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Long-term physical ageing of chalcogenide glasses, which occurs over tens of years, is much less understood than the short-term ageing. With Se-rich underconstrained As 30 Se 70 glass as a model composition (consisting of Se n chains with n 3 on average), a microscopic model is developed for this phenomenon by combining information from differential scanning calorimetry, extended x-ray absorption fine structure, Raman, and 77 Se solid state nuclear magnetic resonance spectroscopies. The accompanying changes in the electronic structure of these glasses are investigated by x-ray photoelectron spectroscopy. The data suggest ageing from cooperative relaxation, presumably involving bond switching or reconfiguration of As-Se-Se-As fragments.

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“…The photoinduced effects of bandgap light and corresponding changes in the XPS spectra of chalcogenide glass films are well documented [19][20][21]. Our earlier studies showed negligible effect of X-ray irradiation on the atomic or electronic structure of simple chalcogenide glass films (i.e.…”

Section: Discussionmentioning

confidence: 71%