The Electronic Potential of Paraelectric SbSI

Batarūunas, J.; Audzijonis, A.; Mykolaitienė, N.; Žičkus, K.

doi:10.1002/pssb.2221500143

Cited by 4 publications

(2 citation statements)

References 15 publications

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“…In Figure 4 one can see that atoms shift in a lattice under applied stress. It is especially visible on sulfur atoms, in which the shift is significant due to its small molar mass compared with iodine and antimony and the interaction between them [ 80 , 81 ]. The sulfur atoms shift along the c-axis direction.…”

Section: Resultsmentioning

confidence: 99%

X-ray Diffraction and Piezoelectric Studies during Tensile Stress on Epoxy/SbSI Nanocomposite

Godzierz

Toroń

Szperlich

et al. 2022

Sensors

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In this paper, the performance of epoxy/SbSI nanocomposite under tensile stress was investigated. X-ray diffraction studies show the main stress mode has shear nature in the case of elastic deformation, while a combination of shear and tensile stress during plastic deformation caused lattice deformation of SbSI and shift of sulfur atoms along the c axis of the unit cell. Apart from that, the piezoelectric signals were recorded during tensile tests. Epoxy/SbSI nanocomposite responded to the applied tensile stress by generating a piezoelectric current with a relatively high value. The measured piezoelectric peak-to-peak current is relatively high (Ip-p = 1 pA) in comparison to the current flowing through the sample (8.16 pA) under an applied voltage of 100 V. The current level is independent of the deformation speed rate in contradistinction to complex stress states. The signal comes from the whole volume of the sample between electrodes and is generated by shear stress.

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Section: Resultsmentioning

confidence: 99%

X-ray Diffraction and Piezoelectric Studies during Tensile Stress on Epoxy/SbSI Nanocomposite

Godzierz

Toroń

Szperlich

et al. 2022

Sensors

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“…In [24] we have proposed the method for calculating the total potential energy. The potential energy (PE) is defined as follows:…”

Section: The Lattice Anharmonism On the Vibrational Spectrum Along Thmentioning

confidence: 99%

Electronic Structure and Piezoelectric Properties of SbSI Crystals

Audzijonis¹,

Žigas²,

Sereika³

et al. 2016

Piezoelectric Materials

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The SbSI crystals are investigated in the paraelectric and ferroelectric phases. The calculations have been performed to find the symmetry and normal coordinates of vibrational modes. We have observed that potential energy with double well create the soft mode of B 1u symmetry in the microwave range and semisoft modes in the IR range. The A u and B g symmetry, top electronic levels of the highest valence band, are degenerate in the paraelectric phase. It is shown that the Jahn-Teller effect is caused by A u symmetry normal mode interacting with the degenerate A u symmetry electronic states in the valence band top. The pseudo-Jahn-Teller effect is induced due to the same mode interacting with A u symmetry electronic states in the valence band and B g symmetry states in the conduction band bottom. Concerning these two effects, the normal mode force constant K decreases and vibrational constants undergo changes during the phase transition. The theoretical deformation along the crystallographicx(a), y(b), and z(c)-axes were studied for Sb atoms. The major change of piezoelectric modulus takes place in the ferroelectric phase near the phase transition temperature. At lower temperatures piezoelectric modulus changes become slow. The value as well as anomalous temperature dependence of piezoelectric modulus and Δz(T) is influenced by the change of mean potential energy V p (z) of Sb atoms in soft mode.

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