Pressure and photo-induced phase transitions in sulphur investigated by Raman spectroscopy

Eckert, Bodo; Schumacher, Richard; Jodl, H. J.; Foggi, Paolo

doi:10.1080/08957950008200934

Cited by 18 publications

(34 citation statements)

References 48 publications

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“…Raman spectra of the recovered laser heating products of two different laser heating experiments. The black line depicts data for Sμ and α-S 8 from Eckert et al [48]. Table 3 Raman frequencies of CF 4 from theoretical and experimental data.…”

Section: Raman Spectroscopymentioning

confidence: 97%

“…The most intense of these bands was located at around 460 cm À 1 . This position is characteristic for stretching modes of many sulfur allotropes [48]. The broad bands can therefore be correlated with amorphous sulfur.…”

Section: Modelmentioning

confidence: 97%

“…Most sulfur allotropes do not have bands at 500-600 cm À 1 . However, a sulfur allotrope named p-S has bands in this region [48]. Degtyareva et al [49] have shown that p-S corresponds to helical S-II or is at least structurally closely related to it.…”

Section: Modelmentioning

confidence: 98%

“…The observed Raman bands were characteristic for S μ and α-S 8 . S μ is a sulfur allotrope which consists of helical chains [48] but it is unclear if the structure is similar to that of S-II or not. The reference spectra for these sulfur allotropes by Eckert et al [48] are also shown in Fig.…”

Section: Raman Spectroscopymentioning

confidence: 98%

“…In addition to the sulfur band at around 460 cm À 1 , bands at higher wavenumbers of up to 550 cm À 1 became observable. Eckert et al [48] have studied the phase transformations of sulfur at high pressures. Most sulfur allotropes do not have bands at 500-600 cm À 1 .…”

Section: Modelmentioning

confidence: 99%

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Study of the reaction products of SF6 and C in the laser heated diamond anvil cell by pair distribution function analysis and micro-Raman spectroscopy

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Section: Raman Spectroscopymentioning

confidence: 97%

Section: Modelmentioning

confidence: 97%

Section: Modelmentioning

confidence: 98%

Section: Raman Spectroscopymentioning

confidence: 98%

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confidence: 99%

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Structure and photo-induced effects in elemental chalcogens: a review on Raman scattering

Yannopoulos

2020

J Mater Sci: Mater Electron

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Much progress has been made over a long period, spanning more than a century, in understanding the atomic arrangement on various length scales of non-crystalline chalcogens and their transitions upon certain external stimuli. However, it is broadly admitted that there are still several unsettled issues that call for proper rationalization. The current review presents an assessment of Raman scattering studies of non-crystalline phases of elemental chalcogens and their mixtures. First, a few remarks on the analysis of Raman data, related to polarization details and spectra reduction are presented. The effect of temperature, pressure and irradiation on the structure of chalcogens is reviewed in detail. As only selenium can form a stable glass at ambient conditions, the interest on sulfur and tellurium has been placed in the melt and the amorphous phase, respectively, whereas reference is also made to the sporadic structural studies of glassy sulfur at low temperatures. It is shown how Raman scattering can be exploited to explore unique phenomena emerging in the liquid state of sulfur, offering valuable information on the details of λ−transition including various thermodynamic-related properties. The subtle nature of this transition in selenium is also discussed. Tellurium is not only impossible to be prepared in the bulk glassy state, but also forms a very liable to crystallization amorphous film. Therefore, the emphasis is placed on light-induced nanostructuring and effects related to photo-amorphization and photo-oxidation. 2 IntroductionNon-crystalline chalcogenides, either as bulk glasses or amorphous films, have attracted extensive interest since their discovery, not only from the viewpoint of fundamental science but in addition owing to the technological potential that these materials exhibit over diverse sectors of active and passive applications [1,2]. Structure on the atomic scale is the decisive factor that determines macroscopic properties and ultimately function of the material. In addition, photoinduced effects, a hallmark of non-crystalline chalcogenides, depend on composition since structural arrangement must be suitable to allow photoinduced transformations on various length scales [3,4]. Understanding structure will not only allow identifying why a material behaves macroscopically in a certain manner, but will make feasible to establish structure-property relations. The latter are central to progress from serendipitous discoveries of functional materials to a rational design of materials with tailored properties. Disorder abolishes all the amenities accompanying the crystal periodicity, which render the role of structure-property relationships indispensable to disordered media.Resolving structure in the amorphous state is per se a formidable task. This is true even for simple systems, e.g. monoatomic chalcogens, let alone for multicomponent materials. Research for applications in non-crystalline chalcogenides has since the beginning of their discovery moved to studies of multicomponent systems, i.e....

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Pressure and photo-induced phase transitions in sulphur investigated by Raman spectroscopy

Cited by 18 publications

References 48 publications

Study of the reaction products of SF6 and C in the laser heated diamond anvil cell by pair distribution function analysis and micro-Raman spectroscopy

Study of the reaction products of SF6 and C in the laser heated diamond anvil cell by pair distribution function analysis and micro-Raman spectroscopy

Photoreactions Create Superconducting Materials

Structure and photo-induced effects in elemental chalcogens: a review on Raman scattering

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