Structural Phase Transition in Crystalline HgSe: Low-Temperature and High-Pressure Raman Spectroscopic Investigation
Научная публикация
| Журнал |
Journal of Physics and Chemistry of Solids
ISSN: 0022-3697
|
| Вых. Данные |
Год: 2025,
Том: 207,
Номер статьи
: 112977,
Страниц
: 11
DOI:
10.1016/j.jpcs.2025.112977
|
| Ключевые слова |
Phonon dynamics; Vibrational eigenmodes; Pressure-induced phase transition; Anharmonic lattice potential |
| Авторы |
Kumar N.
1,2
,
Kesari Swayam
3
,
Krylova S.N.
4
,
Rao Rekha
3,5
,
Surovtsev N.V.
6
,
Ishchenko D.V.
1
,
Pryanichnikov S.V.
7
,
Govorkova T.E.
8
,
Bobin S.B.
8
,
Lonchakov A.T.
8
,
Golyashov V.A.
1,9,10
,
Tereshchenko O.E.
1,9,10
|
| Организации |
| 1 |
Rzhanov Institute of Semiconductor Physics, SB RAS, Novosibirsk, 630090, Russia
|
| 2 |
Tomsk State University, 36 Lenin Ave., Tomsk, 634050, Russia
|
| 3 |
Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai, 400085, India
|
| 4 |
Kirensky Institute of Physics SB RAS, Krasnoyarsk, 660036, Russia
|
| 5 |
Homi Bhabha National Institute, Anushaktinagar, Mumbai, 400094, India
|
| 6 |
Institute of Automation and Electrometry, SB, RAS, Novosibirsk, 630090, Russia
|
| 7 |
Institute of Metallurgy Urals Division of Russian Academy of Sciences, Ekaterinburg, 620016, Russia
|
| 8 |
M.N. Mikheev Institute of Metal Physics of Ural Branch of Russian Academy of Sciences, 620108, Yekaterinburg, Russia
|
| 9 |
Synchrotron Radiation Facility SKIF, Boreskov Institute of Catalysis, Koltsovo, Russia
|
| 10 |
Department of Physics, Saint Petersburg State University, St. Petersburg, Russia
|
|
Информация о финансировании (4)
|
1
|
Министерство науки и высшего образования Российской Федерации (с 15 мая 2018)
|
FWUR-2024-0040
|
|
2
|
Российский научный фонд
|
23-12-00016 (123060600015-0)
|
|
3
|
Правительство Российской Федерации
|
ДЧ-П8-45981 (125022702939-2)
|
|
4
|
Министерство науки и высшего образования Российской Федерации (с 15 мая 2018)
|
|
At ambient pressure and temperature, Raman spectroscopy showed A1, E and T2 modes in HgSe which suggested coexistence of zinc blende (zb) and cinnabar (cin) phase. A blue shift of A1 and E Raman modes was observed with increasing temperature, which was explained by the reduction of lattice constant. Experimental results of Raman spectroscopy were consistent with the DFT calculation, both predicted transition to cin phase at moderate pressure of 1.5–1.8 GPa, and a complete absence of the Raman modes was observed above pressure of 16 GPa, confirming the transformation to the NaCl structure. The pressure-dependent frequency shift, linewidth and Raman intensity was explained by eigenvectors of vibrational symmetry of the modes, anharmonic effect and changes in polarizability.