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Photoelasticity of crystals with the scheelite structure: quantum mechanical calculations.
Acta Crystallogr B Struct Sci Cryst Eng Mater
February 2025
Faculty of Electrical Engineering, Czestochowa University of Technology, 17 Al. Armii Krajowej, Częstochowa, PL-42200, Poland.
We report a complete set of elastic, piezooptic and photoelastic tensor constants of scheelite crystals CaMoO, BaMoO, BaWO and PbWO determined by density functional theory (DFT) calculations using the quantum chemical software package CRYSTAL17. The modulation parameter, i.e.
View Article and Find Full Text PDFUnlocking the mechanical, thermodynamic and thermoelectric properties of NaSbS: A DFT scheme.
Heliyon
January 2025
Department of Physics, University of Rajshahi, Rajshahi, 6205, Bangladesh.
The present study focuses on the ground state mechanical, acoustic, thermodynamic and electronic transport properties of NaSbS polymorphs using the density functional theory (DFT) and semi-classical Boltzmann transport theory. The mechanical stability of the polymorphs is affirmed by the calculated elastic tensor. The calculated elastic properties asserted that all the polymorphs exhibit soft, brittle, anisotropic nature containing dominant covalent bonding.
View Article and Find Full Text PDFLesion correlates of impaired acoustic-phonetic perception after unilateral left hemisphere stroke.
Brain
January 2025
Department of Neurology, Medical College of Wisconsin, Milwaukee, WI 53226, USA.
Acoustic-phonetic perception refers to the ability to perceive and discriminate between speech sounds. Acquired impairment of acoustic-phonetic perception is known historically as "pure word deafness" and typically follows bilateral lesions of the cortical auditory system. The extent to which this deficit occurs after unilateral left hemisphere damage and the critical left hemisphere areas involved are not well defined.
View Article and Find Full Text PDFHigh resolution Brillouin spectroscopy of the surface acoustic waves in SbTe van der Waals single crystals.
Sci Rep
January 2025
ISQI, Faculty of Physics, Adam Mickiewicz University in Poznań, Poznań, Poland.
High-resolution Brillouin spectroscopy was employed to investigate the anisotropy in surface wave velocities within a bulk single crystal of SbTe, a well-known layered van der Waals material. By leveraging the bulk elastic constants derived from various simulation methods, we were able to theoretically calculate the distribution of surface acoustic phonon velocities on the cleavage plane of the material. Upon analyzing multiple simulation results, it became evident that the most significant discrepancies arose in the calculations of the elastic constant c, with values ranging from 48 to 98 GPa.
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