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Gorelik, V. S.
Raman scattering in sodium nitrite crystals near the phase transition / V. S. Gorelik, A. Y. Pyatyshev, A. S. Krylov // Phys. Solid State. - 2016. - Vol. 58, Is. 1. - P. 170-176, DOI 10.1134/S1063783416010133. - Cited References: 39. - This study was supported by the Russian Foundation for Basic Research (project nos. 12-02-00491, 13-02-00449, 13-02-90420, and 14-02-00190). . - ISSN 1063-7834

РУБ Physics, Condensed Matter
Рубрики:
NaNO2
   SPECTROSCOPY
   DEPENDENCE
   SPECTRUM
   SEARCH
   MODES
Аннотация: Optical Raman spectra of a ferroelectric sodium nitrite crystal have been detected in a wide spectrum range at various temperatures, including the region of the ferroelectric phase transition. A manifestation of a transverse soft polar mode of the A1(z) type responsible for the ferroelectric phase transition has been discovered in the spectrum at room temperature. This mode has been found to become overdamped even far from the ferroelectric phase transition temperature. This mode also appears as a central peak under heating. It has been found that the pseudoscalar mode of the A2 type has the highest intensity in the Raman spectrum of sodium nitrite. The frequency corresponding to the maximum intensity of this mode in the Raman spectrum varies from 130 cm–1 at 123 K to 106 cm–1 at T = 513 K. A fair agreement of the experimental data for the A1(z) mode with the Lyddane–Sachs–Teller relation has been established. The polariton curves for the A1(z) polar mode and the dispersion curves for axinons has been plotted. © 2016, Pleiades Publishing, Ltd.

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Публикация на русском языке Горелик, Владимир Семенович. Комбинационное рассеяние света в области фазового перехода в кристаллах нитрита натрия [Текст] / В. С. Горелик, А. Ю. Пятышев, А. С. Крылов // Физ. тверд. тела : Физико-технический институт им. А. Ф. Иоффе РАН, 2016. - Т. 58 Вып. 1. - С. 163-169

Держатели документа:
Lebedev Physical Institute, Russian Academy of Sciences, Leninskii pr. 53, Moscow, Russian Federation
Bauman Moscow State Technical University, Vtoraya Baumanskaya ul. 5, Moscow, Russian Federation
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Akademgorodok 50, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Pyatyshev, A. Y.; Krylov, A. S.; Крылов, Александр Сергеевич
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    Raman scattering in dried DNA and crystalline amino acids / V. S. Gorelik [et al.] // Phys. Wave Phenom. - 2016. - Vol. 24, Is. 4. - P. 272-278, DOI 10.3103/S1541308X1604004X. - Cited References: 53. - The work was supported in part by the RFBR Projects 14-02-00190 and 16-52-00026 (BRFFR - RFBR F16R-063). . - ISSN 1541-308X
   Перевод заглавия: Комбинационное рассеяние света в высушенной ДНК и кристаллических аминокислот
Аннотация: Raman spectrum characteristics of dried deoxyribonucleic acid (DNA) and two types of crystalline amino acids (L-lysine, D-asparagine) are compared in a wide range of frequencies, including the regions of lattice (7 to 200 cm−1) and intramolecular (200 to 4000 cm−1) vibrations. It is found that the spectral position of the low-frequency band in the Raman spectrum of DNA with a peak near 26 cm−1 correlates with the Raman spectrum of high-Q low-frequency modes that manifest themselves in the crystalline amino acids under investigation. The low-frequency band of DNA refers to a twist-like vibrational mode of nucleobases. The intensities of this DNA mode and the high-Q lattice modes of the crystalline amino acids L-lysine and D-asparagine are several times as high as those of the Raman lines corresponding to the intramolecular modes. Resonant coupling of low-frequency modes of DNA and amino acid molecular chains is analyzed. © 2016, Allerton Press, Inc.

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Держатели документа:
Lebedev Physical Institute, Russian Academy of Sciences, Leninskiy pr. 53, Moscow, Russian Federation
Bauman Moscow State Technical University, ul. 2-ya Baumanskaya 5/1, Moscow, Russian Federation
Kirensky Institute of Physics, Siberian Branch of the Russian Academy of Sciences, Akademgorodok 50, str. 38, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Gorelik, V. S.; Zlobina, L. I.; Krylov, A. S.; Крылов, Александр Сергеевич; Sverbil, V. P.; Sverbil, P. P.
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    Gorelik, V. S.
    Raman light scattering in sodium nitrite crystals / V. S. Gorelik, A. Y. Pyatyshev, A. S. Krylov // Bull. Lebedev Phys. Inst. - 2016. - Vol. 43, Is. 5. - P. 167-173, DOI 10.3103/S1068335616050043. - Cited References:37. - This study was supported by the Russian Foundation for Basic Research, projects nos. 12-02-00491, 13-02-00449,13-02-90420, 14-02-00190. . - ISSN 1068-3356. - ISSN 1934-838X
Рубрики:
NANO2
   PHASE
   SPECTROSCOPY
   PARAPHOTONS
   DEPENDENCE
   SPECTRUM
   SEARCH
Кл.слова (ненормированные):
sodium nitrite -- Raman scattering -- spectrum -- polar mode -- polariton -- ferroelectric -- dispersion curves
Аннотация: Raman light scattering spectra of a ferroelectric sodium nitrite crystal is studied in the lattice mode region as the temperature is lowered from room temperature to 123 K. The existence of a Raman satellite corresponding to the soft lattice mode, i.e., transverse polar vibration responsible for the ferroelectric phase transition, is established for the first time. It is found that the intensity of the Raman scattering by the pseudo-scalar low-frequency A (2) mode exceeds the intensity of other lattice variations by an order of magnitude.

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Публикация на русском языке Горелик, Владимир Семенович. Комбинационное рассеяние света в кристаллах нитрита натрия [Текст] / В. С. Горелик, А. Ю. Пятышев, А. С. Крылов // Кратк. сообщ. по физ. : Физический институт им. П. Н. Лебедева РАН, 2016. - Т. 43 № 5. - С. 26-36

Держатели документа:
Russian Acad Sci, PN Lebedev Phys Inst, Leninskii Pr 53, Moscow 119991, Russia.

Доп.точки доступа:
Pyatyshev, A. Yu.; Krylov, A. S.; Крылов, Александр Сергеевич; Russian Foundation for Basic Research [12-02-00491, 13-02-00449, 13-02-90420, 14-02-00190]
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Gorelik, V. S.
Raman scattering in a ferroelectric sodium nitrite crystal / V. S. Gorelik, A. Y. Pyatyshev, A. S. Krylov // Bull. Russ. Acad. Sci. Phys. - 2016. - Vol. 80, Is. 9. - P. 1127-1130, DOI 10.3103/S1062873816090136. - Cited References: 25 . - ISSN 1062-8738
Кл.слова (ненормированные):
Ferroelectric devices -- Ferroelectricity -- Raman scattering -- Sodium -- Ferroelectric phase transition -- Overdamped -- Sodium nitrite -- Soft modes -- Wide spectral range -- Ferroelectric materials
Аннотация: Raman spectra of the ferroelectric sodium nitrite are recorded over a wide spectral range at different temperatures, including the ferroelectric phase transition interval. The room-temperature Raman spectrum reveals the overdamped А1(z) soft mode which is attributed to the ferroelectric phase transition. © 2016, Allerton Press, Inc.

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Публикация на русском языке Горелик, Владимир Семенович. Комбинационное рассеяние света в сегнетоэлектрическом кристалле нитрита натрия [Текст] / В. С. Горелик, А. Ю. Пятышев, А. С. Крылов // Изв. РАН. Сер. физич. - 2016. - Т. 80 № 9. - С. 1234-1237

Держатели документа:
Lebedev Physical Institute, Russian Academy of Sciences, Moscow, Russian Federation
Bauman Moscow State Technical University, Moscow, Russian Federation
AO NPP Istok, Fryazino, Russian Federation
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Pyatyshev, A. Y.; Krylov, A. S.; Крылов, Александр Сергеевич
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