Soft mode and its electronic potential in SbSI-type mixed crystals

Kvedaravičius, S.; Audzijonis, A.; Mykolaitienė, N.; Grigas, J.

doi:10.1080/00150199608223627

Cited by 29 publications

(19 citation statements)

References 12 publications

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“…However, due to a higher atomic form factor, i.e. higher density of electrons of Se in SbSeI than of S in SbSI, the SbSeI crystals are not ferroelectrics in the whole temperature range [9].…”

Section: Introductionmentioning

confidence: 99%

X-ray photoelectron spectra and electronic structure of quasi-one-dimensional SbSeI crystals

Grigas¹,

Talik²,

Adamiec³

et al. 2007

Condens. Matter Phys.

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The paper presents the X-ray photoelectron spectra (XPS) of the valence band (VB) and of the principal core levels from the (110) and (001) crystal surfaces for the quasi-one-dimensional high permittivity SbSeI single crystal isostructural to ferroelectric SbSI. The XPS were measured with monochromatized Al Ka radiation in the energy range of 0-1400 eV at room temperature. The VB is located from 1.6 to 20 eV below the Fermi level. Experimental energies of the VB and core levels are compared with the results of theoretical ab initio calculations of the molecular model of the SbSeI crystal. The electronic structure of the VB is revealed. Shifts in the core-level binding energies of surface atoms relative to bulk ones, which show a dependency on surface crystallography, have been observed. The chemical shifts of the core levels (CL) in the SbSeI crystal for the Sb, I and Se states are obtained.

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Section: Introductionmentioning

confidence: 99%

X-ray photoelectron spectra and electronic structure of quasi-one-dimensional SbSeI crystals

Grigas¹,

Talik²,

Adamiec³

et al. 2007

Condens. Matter Phys.

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“…In these crystals, the phase transition takes place when the temperature attains the point corresponding to kT C =DV C . We have found that in SbSe x S 1-x I, SbSBr x I 1-x , Bi x Sb 1-x SI, the B 1u soft mode has two components: the soft mode in the microwave region [8,10,13] and the soft mode in the IR (infrared) spectral range. The reasons of existence of the two components of the soft mode were described detail in Refs.…”

Section: Introductionmentioning

confidence: 96%

“…They are influenced by light, leading to photoconductivity, photoferroelecticity, etc. Solid solutions of various combinations SbSISbSeI [6][7][8], SbSI-SbSBr [9,10], BiSI-SbSI [11][12][13] have been most intensively studied because they have the Curie temperatures depending on mixture composition. For example, the solid solutions SbSe x S 1-x I have the Curie temperature T C = 0-293 K, when x varies from 1 to 0.…”

Section: Introductionmentioning

confidence: 99%

Origin of soft mode in SbSexS1–xI crystals

Audzijonis¹,

Žigas²,

Siroic³

et al. 2004

Physica B: Condensed Matter

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“…In [10], it has been theoretically studied how the phase transition temperature T C depends on the mixture composition x (or the average form factor) in SbSI-type mixed crystals. It has been found that when x grows, then the decrease of f VI causes T C to increase.…”

Section: Growing Sbo X S 1−x I Crystalsmentioning

confidence: 99%

Growing of SbO_xS_1-xI crystals and investigation of vibrational spectra in the phase transition region

Audzijonis¹,

Žigas²,

Žaltauskas³

et al. 2004

Lith. J. Phys.

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SbOxS1−xI (x = 0−0.5) crystals have been grown from the vapour phase. Reflection spectra of the SbOxS1−xI (x = 0.2) crystals were studied by a modernized Fourier spectrometer at E c. Using an improved Kramers-Kronig technique with two confining spectral limits, the spectra of optical constants and optical functions were calculated. The vibrational frequencies ωL and ωT have been evaluated. The vibrational frequencies of SbOxS1−xI (x = 0.2) chains in different phases have been calculated in the harmonic approximation. The theoretical results are compared with experimental data.

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Soft mode and its electronic potential in SbSI-type mixed crystals

Cited by 29 publications

References 12 publications

X-ray photoelectron spectra and electronic structure of quasi-one-dimensional SbSeI crystals

X-ray photoelectron spectra and electronic structure of quasi-one-dimensional SbSeI crystals

Origin of soft mode in SbSexS1–xI crystals

Growing of SbO_xS_1-xI crystals and investigation of vibrational spectra in the phase transition region

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Soft mode and its electronic potential in SbSI-type mixed crystals

Cited by 29 publications

References 12 publications

X-ray photoelectron spectra and electronic structure of quasi-one-dimensional SbSeI crystals

X-ray photoelectron spectra and electronic structure of quasi-one-dimensional SbSeI crystals

Origin of soft mode in SbSexS1–xI crystals

Growing of SbOxS1-xI crystals and investigation of vibrational spectra in the phase transition region

Contact Info

Product

Resources

About

Growing of SbO_xS_1-xI crystals and investigation of vibrational spectra in the phase transition region