Order–Disorder Transitions in Cerium Hydrides, Manifested in Temperature-Dependent Raman Scattering Spectroscopy

Phononic and electronic Raman scattering of CeH2+x (x = 0.25, 0.50, 0.79, and 0.94) were explored within the temperature range of 77–345 K. The experimental analysis was theoretically supported by DFT-calculated phonon dispersion curves an...

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Autor Principal:	Shahar Aziza (22209709) (author)
Outros autores:	Soshi Iimura (4446415) (author), Chengyu Jin (2212117) (author), Karin Fink (247858) (author), Shmuel Hayun (1282047) (author), Tsachi Livneh (1914046) (author)
Publicado:	2025
Subjects:	Biophysics Medicine Inorganic Chemistry Astronomical and Space Sciences not elsewhere classified Biological Sciences not elsewhere classified Chemical Sciences not elsewhere classified Physical Sciences not elsewhere classified ∼ 245 k ∼ 200 k result goes along metal – semiconductor expected wyckoff positions embedded cluster calculations cubic – tetragonal theoretically demonstrated lah frequency placed within crystal field scheme additional orthorhombic phase crystal field states 3 +</ sup expressed spectrum commences octahedral h vacancies raman scattering analysis electronic raman scattering 94 </ sub 79 </ sub 25 </ sub raman scattering raman spectrum expressed spectrum x </ octahedral h theoretically supported scheme raises explored within experimental analysis ></ sub tetrahedral h h displacement two phases systematically demonstrate sublattice rearrangements sublattice phonons structured long strongly affected spectral profile spectral changes previously shown phonon density phase transition modified landscape following changes energy gap diffraction patterns defined structures closely follow although first
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Order–Disorder Transitions in Cerium Hydrides, Manifested in Temperature-Dependent Raman Scattering Spectroscopy

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