Electronic Potentials of Normal Vibrational Modes in SbSI Crystals

Audzijonis, A.; Žigas, L.; Narušis, J.; Žaltauskas, R.; Audzijonienė, L.

doi:10.1080/00150190213964

Cited by 15 publications

(16 citation statements)

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“…Crystallization took place at the other end of the ampoule at a temperature of 630 K. In the course of 3-4 days, the crystals grew up to dimensions of 4 × 5 × 10 mm with a well-developed crystallographic planes and had no internal cavities. The details of crystals growing and their optical properties are presented in [10,11].…”

Section: Methodsmentioning

confidence: 99%

Electronic Conduction Model in Ferroelectrics Based on Phonon-Assisted Tunneling Emission

Pipinys¹,

Lapeika²,

Audzijonis³

2004

Ferroelectrics

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We present here experiments on current-voltage (I-V) characteristics measured at different temperatures for ferroelectric semiconductor SbSI. The I-V characteristics exhibited an evident dependence on temperature and supralinearity in the region of high voltages. Temperature dependent I-V characteristics are explained on assumption that the current is caused by a process of the phonon-assisted electron tunneling from the traps located in the region of a high electric field. Under basis of this model the results on current dependences on voltage and temperature obtained by other authors are also explained.

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Section: Methodsmentioning

confidence: 99%

Electronic Conduction Model in Ferroelectrics Based on Phonon-Assisted Tunneling Emission

Pipinys¹,

Lapeika²,

Audzijonis³

2004

Ferroelectrics

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“…(4)-(7), when the atoms in different chains oscillate with opposite phases. These atoms move with opposite phases in the case, when we take A u (A 2 ) symmetry coordinates [25] (presented in Table 2) as the normal coordinates. Employment of the symmetry coordinates for A u (A 2 ) vibrational modes in Eq.…”

Section: Article In Pressmentioning

confidence: 99%

Origin of soft mode in SbSexS1–xI crystals

Audzijonis¹,

Žigas²,

Siroic³

et al. 2004

Physica B: Condensed Matter

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“…Since in the IR spectral range of ω > 100 cm -1 the total energy curves of vibrational modes are only slightly anharmonic (in contrast to the range of ω < 100 cm -1 ) [14], we 114 A. Audzijonis et al shall analyse the vibrational spectra of SbO x S 1-x I in the harmonic approximation.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Vibrational Spectra of SbOxS1–xI Crystals in the Phase Transition Region

Audzijonis¹,

Žigas²,

Siroicas³

et al. 2004

Ferroelectrics

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SbO x S 1−x I (x = 0-0.5) crystals have been grown from the vapour phase. Reflection spectra of the SbO x S 1−x I (x = 0.2) crystals were studied by a modernized Fourier spectrometer. Using an improved Karmers-Kronig technique with two confining spectral limits, the spectra of optical parameters and optical functions were calculated. The vibrational frequencies ω L and ω T have been evaluated. The vibrational frequencies of SbSI and SbO x S 1−x I (x = 0.5) chains in different phases have been calculated in the harmonic approximation. The theoretical results are compared with experimental data. Taking into account the anharmonicity of the electronic structure and lattice, caused mainly by the phonon-phonon interaction, the phase transition temperature T C as a function of the mixture composition x has been evaluated. The dependence of the total potential energy function of the soft B 1u mode upon temperature determines variation of its frequency ω 2 s in the phase transition region.

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Electronic Potentials of Normal Vibrational Modes in SbSI Crystals

Cited by 15 publications

References 0 publications

Electronic Conduction Model in Ferroelectrics Based on Phonon-Assisted Tunneling Emission

Electronic Conduction Model in Ferroelectrics Based on Phonon-Assisted Tunneling Emission

Origin of soft mode in SbSexS1–xI crystals

Investigation of Vibrational Spectra of SbOxS1–xI Crystals in the Phase Transition Region

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