Effect of pressure on Raman spectra of SnS2 single crystals

Utyuzh, A. N.; Timofeev, Yu. A.; Stepanov, G. N.

doi:10.1134/s1063783410020216

Cited by 19 publications

(12 citation statements)

References 17 publications

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“…It should be noted that in the literature, SnS2 with a structure identical to that of 1T-MoS2 as shown in Fig. 1(a) is called 2H-SnS2 [17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32] , which should not be confused with the structure of 2H-MoS2. In 2H-SnS2, a metal atom is octahedrally coordinated by sulfur atoms, whereas the metal atom in 2H-MoS2 possesses trigonal prismatic coordination 16 .…”

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confidence: 99%

“…SnS2 is among the most important sulfide compounds of tin [13][14] and has more than 70 polytypes [13][14][15] differing from one another by stacking sequences of the individual sandwiched layers. The most common one is 2H-SnS2 whose basic layer consists of a sheet of close-packed tin atoms sandwiched between two sheets of sulfur atoms [16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32] . It should be noted that in the literature, SnS2 with a structure identical to that of 1T-MoS2 as shown in Fig.…”

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confidence: 99%

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Low-Frequency Raman Spectroscopy of Few-Layer 2H-SnS2

Sriv¹,

Kim²,

Cheong³

2018

Sci Rep

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We investigated interlayer phonon modes of mechanically exfoliated few-layer 2H-SnS2 samples by using room temperature low-frequency micro-Raman spectroscopy. Raman measurements were performed using laser wavelengths of 441.6, 514.4, 532 and 632.8 nm with power below 100 μW and inside a vacuum chamber to avoid photo-oxidation. The intralayer Eg and A1g modes are observed at ~206 cm−1 and 314 cm−1, respectively, but the Eg mode is much weaker for all excitation energies. The A1g mode exhibits strong resonant enhancement for the 532 nm (2.33 eV) laser. In the low-frequency region, interlayer vibrational modes of shear and breathing modes are observed. These modes show characteristic dependence on the number of layers. The strengths of the interlayer interactions are estimated by fitting the interlayer mode frequencies using the linear chain model and are found to be 1.64 × 1019 N · m−3 and 5.03 × 1019 N · m−3 for the shear and breathing modes, respectively.

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confidence: 99%

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confidence: 99%

Low-Frequency Raman Spectroscopy of Few-Layer 2H-SnS2

Sriv¹,

Kim²,

Cheong³

2018

Sci Rep

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“…Широкая полоса максимумом на ν = 270 cm −1 связана с поперечными оптическими (ТО) фононными модами (A 1 (TO), E 1 (TO)). Интенсивная полоса с максимумом на ν = 340 cm −1 может быть поставлена в соответствие с продольными оптическими (LO) модами A 1 (LO) и E 1 (LO [21]. Вид спектра оптической плотности НПС с микро-и нанодендритами из SnS 2 (рис.…”

Section: методика экспериментовunclassified

“…8. На спектре наблюдаются две полосы на частотах 205 и 315 cm −1 , характерные для 2H политипа SnS 2 с гексагональной элементарной ячейкой и пространственной группой [21][22][23][24]. Низкочастотная мода, имеющая малую интенсивность, соответствует дважды вырожденной E g -моде и связана с плоскостными колебаниями типа растяжения атомов серы.…”

Section: методика экспериментовunclassified

Оптические Свойства Нанокомпозитов На Основе Сульфидов Цинка И Олова В Нанопористом Силикатном Стекле

Sidorov¹,

Тунг²,

Ву³

et al. 2019

Журнал Технической Физики

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Spectra of optical density, luminescence, and Raman scattering of micro- and nanodendrites of crystal zinc and tin sulfides in silica nanoporous glass (NPG) with average pore size 25 nm are presented. Sulfide nanodendrites were synthesized by sulfurizing of zinc and tin nanodendrites, which were grown in NPG pores by electrolysis. It is shown that the luminescence of sulfide nanodendrites is caused by the defects of crystal lattice. The main bands of Raman spectrum of nanodendrites are caused by transverse and longitude vibration modes of hexagonal ZnS (wurtzite) and stretching modes of 2H polytype of SnS2 with hexagonal cell. The obtained results can be used for creating of chemical and biosensors, and also in photovoltaics and photocatalyze.

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“…In the Raman active modes, the Sn atom is located at the centre of inversion and therefore must remain stationary. Thus the two chalcogen atoms vibrate in opposition to each other in these Raman modes [6][7][8].…”

Section: Introductionmentioning

confidence: 98%