Электронный каталог

Статья

Abdullayev, A.P.
Vibrational Properties and High-Pressure Structural–Lattice Evolution of Tl-Alloyed TlGaTe&sub(2) Semiconductors / A.P.Abdullayev, A.G.Asadov, N.V.M.Trung, G.T.Askarkhanova, [a.o.]. – Text : electronic // Solid State Sciences. – 2026. – Vol. 179. – P. 108405. – URL: https://doi.org/10.1016/j.solidstatesciences.2026.108405. – Bibliogr.: 46.

Structural and vibrational properties of Tl -alloyed TlGaTe&sub(2) under pressure were investigated for powders with 0, 5, and 9 at.% excess Tl. High-pressure powder X-ray diffraction (XRD) in the multi-GPa range and room-temperature Raman spectroscopy at ambient pressure were used to investigate the structural and vibrational properties. Rietveld refinement confirmed that the dominant phase retains tetragonal I4/mcm symmetry for all compositions; Tl appears only as a minor secondary component, and no pressure-induced phase transition was detected. The pressure dependences of the lattice parameters reveal strongly anisotropic compression, with a and b much more compressible than c. With increasing Tl content, ka,b decreases, while the bulk modulus rises from ∼21 to 29 GPa, indicating lattice stiffening. Raman spectra show slight phonon hardening, disappearance of B&sub(2)g modes near 220–230 cm&sup(−1), and microstrain growth from 11.9 × 10&sup(−4) to 20.2 × 10&sup(−4). Overall, Tl incorporation tunes elastic rigidity and defect landscape without disrupting crystal symmetry, enabling controlled performance across variable pressures and harsh environments for devices requiring stable operation under high loading.



Спец.(статьи,препринты) = С 350 - Приложения методов ядерной физики в смежных областях
Спец.(статьи,препринты) = С 332.8 - Синхротронное излучение. Лазеры на свободных электронах. Получение и использование рентгеновских лучей
ОИЯИ = ОИЯИ (JINR)2026