host‐defect luminescence of stishovite

Trukhin, A.N.; Kūlis, P.; Jansons, J.; Dyuzheva, T. I.; Lityagina, L. M.; Bendeliani, N. A.

doi:10.1002/pssc.200460240

Cited by 10 publications

(28 citation statements)

References 9 publications

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“…As previously stated [1,[3][4][5]7], we connect the luminescence of a single crystal of stishovite with similar luminescence (also two bands, blue and UV) in as-received oxygen deficient silica glass [13][14][15][16][17] and an analogous luminescence center in α-quartz crystal induced [9][10][11][12] with damaging radiation (γ, neutron and dense electron beam). That means similar defects are observed in these materials.…”

Section: Discussionmentioning

confidence: 80%

“…It was also found that luminescence of stishovite single crystal appears both in recombination and intra center processes [1,[3][4][5], and in ionizing or photo irradiation. Additionally, in the case of poly-crystals, the photoluminescence excitation spectrum was measured [2].…”

Section: Introductionmentioning

confidence: 97%

“…Bendeliani, private communication So far, the position of the intrinsic absorption threshold was determined for a stishovite single crystal and it is situated at 8.75 eV [4] -higher than that for the main tetrahedron structured silicon dioxide crystal -α-quartz, for which it is at 8.5 eV at room temperature. It was discovered that stishovite single-crystal possesses luminescence with a sufficiently high yield both under x-ray or cathode and photo excitations [1,[3][4][5], so luminescence methods could provide valuable information about the properties of electronic states and point defect in stishovite crystal.…”

Section: Introductionmentioning

confidence: 97%

“…An investigation of these modifications is of interest both for fundamental science and for applications in industry. Stishovite, a dense (4.28 g·cm −3 ) octahedron structured polymorph modification has not been studied in sufficient depth yet, however, theoretical and experimental approaches of its study have now commenced and the first results have been obtained [1][2][3][4][5]. It is hard to believe that stishovite and α-quartz can be composed of the same elements in equal proportions, yet can be so different from each other by properties.…”

Section: Introductionmentioning

confidence: 99%

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Luminescence of silicon Dioxide — silica glass, α-quartz and stishovite

Trukhin¹,

Šmits

Chikvaidze

et al. 2011

Open Physics

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Abstract:This paper compares the luminescence of different modifications of silicon dioxide -silica glass, α-quartz crystal and dense octahedron structured stishovite crystal. Under x-ray irradiation of pure silica glass and pure α-quartz crystal, only the luminescence of self-trapped exciton (STE) is detected, excitable only in the range of intrinsic absorption. No STE luminescence was detected in stishovite since, even though its luminescence is excitable below the optical gap, it could not be ascribed to a self-trapped exciton. Under ArF laser excitation of pure α-quartz crystal, luminescence of a self-trapped exciton was detected under two-photon excitation. In silica glass and stishovite mono crystal, we spectrally detected mutually similar luminescences under single-photon excitation of ArF laser. In silica glass, the luminescence of an oxygen deficient center is presented by the so-called twofold coordinated silicon center (L.N. Skuja et al., Solid State Commun. 50, 1069(1984). This center is modified with an unknown surrounding or localized states of silica glass (A.N. Trukhin et al., J. Non-Cryst. Solids 248, 40 (1999)). In stishovite, that same luminescence was ascribed to some defect existing after crystal growth. For α-quartz crystal, similar to silica and stishovite, luminescence could be obtained only by irradiation with a lattice damaging source such as a dense electron beam at a temperature below 80 K, as well as by neutron or γ-irradiation at 290 K. In spite of a similarity in the luminescence of these three materials (silica glass, stishovite mono crystal and irradiated α-quartz crystal), there are differences that can be explained by the specific characteristics of these materials. In particular, the nature of luminescence excited in the transparency range of stishovite is ascribed to a defect existing in the crystal after-growth. A similarity between stishovite luminescence and that of oxygen-deficient silica glass and radiation induced luminescence of α-quartz crystal presumes a similar nature of the centers in those materials.

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Section: Discussionmentioning

confidence: 80%

Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Luminescence of silicon Dioxide — silica glass, α-quartz and stishovite

Trukhin¹,

Šmits

Chikvaidze

et al. 2011

Open Physics

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“…In stishovite samples available for our investigation (synthetic monocrystals and Meteor Crater Arizona "natural" polycrystalline powder), there are two main luminescence bands: a blue one at about 3 eV and UV one at about 4.75 eV [1,[3][4][5]. In addition, a quasimolecular luminescence center ascribed to the presence of carbon impurity was found [7].…”

Section: Introductionmentioning

confidence: 84%

Luminescence of SiO2 and GeO2 crystals with rutile structure. Comparison with α-quartz crystals and relevant glasses (Review Article)

Trukhin¹

2016

Low Temperature Physics

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Luminescence properties of SiO 2 in different structural states are compared. Similar comparison is made for GeO 2 . Rutile and α-quartz structures as well as glassy state of these materials are considered. Main results are that for α-quartz crystals the luminescence of self-trapped exciton is the general phenomenon that is absent in the crystal with rutile structure. In rutile structured SiO 2 (stishovite) and GeO 2 (argutite) the main luminescence is due to a host material defect existing in as-received (as-grown) samples. The defect luminescence possesses specific two bands, one of which has a slow decay (for SiO 2 in the blue and for GeO 2 , in green range) and another, a fast ultraviolet (UV) band (4.75 eV in SiO 2 and at 3 eV in GeO 2 ). In silica and germania glasses, the luminescence of self-trapped exciton coexists with defect luminescence. The latter also contains two bands: one in the visible range and another in the UV range. The defect luminescence of glasses was studied in details during last 60-70 years and is ascribed to oxygen deficient defects. Analogous defect luminescence in the corresponding pure nonirradiated crystals with α-quartz structure is absent. Only irradiation of a α-quartz crystal by energetic electron beam, γ-rays and neutrons provides defect luminescence analogous to glasses and crystals with rutile structure. Therefore, in glassy state the structure containing tetrahedron motifs is responsible for existence of self-trapped excitons and defects in octahedral motifs are responsible for oxygen deficient defects. PACS

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