Raman scattering in SnSe

Nikolić, P.M.; Milković, Lj.; Mihajlović, P.; Lavrenčič, B. B.

doi:10.1007/bf01594258

Cited by 10 publications

(9 citation statements)

References 2 publications

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“…For a more detailed discussion on group theoretical considerations of SnSe see Chandrasekhar et al 31 or Nikoli. 33 The Raman-active modes have Raman tensors with the following structure Hence, the Raman-active vibrational modes are visible only for particular orientations of the crystal axes with respect to the incident and collected laser light and its polarization. For bulklike SnSe, the 4 A g modes should be visible in the parallel configuration, while 2 B 1g should be visible in the crossed configuration.…”

Section: Methodsmentioning

confidence: 99%

Raman Spectroscopy Insights into the Size-Induced Structural Transformation in SnSe Nanolayers

et al. 2014

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Raman spectroscopy is used to probe the structural changes in [SnSe]m[MoSe2]n ferecrystal thin films as a function of m, the number of bilayers of SnSe. In spite of the interleaved structure in the intergrowths, Raman spectra can be described as a superposition of spectra from the individual components, indicating that the interaction at the interface between the components is relatively weak. Analysis of room-temperature Raman spectra indicate that the MoSe2 layers separating the SnSe layers are nanocrystalline in all of the samples studied, with little change as the number of Se-Mo-Se trilayers (n) or SnSe bilayers (m) increases, reflecting the rotational disorder between adjacent trilayers. A thickness-dependent, continuous transition occurs in the SnSe layer as m is increased, from a pseudotetragonal structure when the layers are thin to a bulk-like orthorhombic SnSe structure when the SnSe layer thickness is increased. Polarization analysis of the Raman scattering from these materials allows the symmetry evolution of the SnSe layers through this transition to be determined.

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Section: Methodsmentioning

confidence: 99%

Raman Spectroscopy Insights into the Size-Induced Structural Transformation in SnSe Nanolayers

et al. 2014

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“…The Raman spectrum of bulk SnSe was reported as early as 1977, [ 136,137b ] but it was rarely considered for a long time afterward. In 2017, Luo et al.…”

Section: Properties and Modulationmentioning

confidence: 99%

“…There are 12 active Raman vibration modes excluding inactive and infrared active modes in the above equations. [137] Four B 2g vibration modes are difficult to be detected due to their weak Raman tensors; [136] and two B 1g vibration modes can only be observed under the specific polarization configuration. [138] Furthermore, the A g 0 and a B 3g are usually not detectable at room temperature because their phonon frequency is close to 0, which is 33 and 37 cm −1 .…”

Section: Raman Scatteringmentioning

confidence: 99%

Recent Advances in SnSe Nanostructures beyond Thermoelectricity

Wang

Huang

et al. 2022

Adv Funct Materials

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Layered SnSe is an emerging class of black phosphorus, which is non-toxic, eco-friendly, and chemically stable. Recently, SnSe nanostructures have triggered more research interest and enabled broad applications beyond demonstrating their great performances on thermoelectricity. However, there are also a great many significant studies of SnSe nanostructures beyond thermoelectricity. SnSe quantum dots, nanosheets, nanowires, and thin films with diverse morphologies have been synthesized using various chemical and physical preparation approaches. SnSe is a multi-phase semiconductor, and its nanostructures endow unique properties, including small electron effective mass, ultralow thermal conductivity, huge anisotropy, and the largest 2D piezoelectric coefficient ever predicted. The versatility of SnSe nanostructures can enable potential applications ranging from ultrafast photonics, logic devices, photodetectors, solar cells, photocatalysis, energy storage, and biology to more cutting-edge interdisciplinary subjects. In this review, the recent advances made in SnSe nanostructures are summarized, covering basics, synthesis, properties, and applications, just giving a passing comment on thermoelectricity. An in-depth perspective on the challenges and prospects of SnSe nanostructures toward broad and practical applications is also given.

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“…We turn next to our high-temperature Raman investigations on SnSe. For the P nma-SnSe structure, group theory predicts a total sum of 7 IR-and 12 Raman (R)-active modes at the center of the Brillouin zone Γ [56,60]: whereas for the high-temperature/high-pressure Bbmm-SnSe modification, one expects a total sum of 3 IR-and 6 Raman-active modes [56,60]:…”

Section: A Optical and Vibrational Properties Of Snse As A Function mentioning

confidence: 99%

Effects of temperature and pressure on the optical and vibrational properties of thermoelectric SnSe

Efthimiopoulos

Berg

Bande

et al. 2019

Phys. Chem. Chem. Phys.

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Raman scattering in SnSe

Cited by 10 publications

References 2 publications

Raman Spectroscopy Insights into the Size-Induced Structural Transformation in SnSe Nanolayers

Raman Spectroscopy Insights into the Size-Induced Structural Transformation in SnSe Nanolayers

Recent Advances in SnSe Nanostructures beyond Thermoelectricity

Effects of temperature and pressure on the optical and vibrational properties of thermoelectric SnSe

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