New graphane: inspiration from the structure correlation with phosphorene

2021 ◽  
Author(s):  
Linxin He ◽  
Xinxin Li ◽  
Xin Zhu ◽  
Jianglei Luo ◽  
Zhiqian Chen ◽  
...  
Keyword(s):  
Raman Spectra ◽  
Phonon Dispersion ◽  
Vibration Modes ◽  
Energy Reserves ◽  
Structure Correlation ◽  
Photoelectric Devices

The application of phosphorene and graphane in different photoelectric devices and energy reserves has attracted wide attention. Here, we investigated the Raman spectra, phonon dispersion and vibration modes of four...

scholarly journals Phonon dispersion, Raman spectra, and evidence for spin-phonon coupling in MnV2O4 from first principles

2020 ◽  
Vol 101 (20) ◽  
Author(s):  
Dibyendu Dey ◽  
T. Maitra ◽  
U. V. Waghmare ◽  
A. Taraphder
Keyword(s):  
Raman Spectra ◽  
First Principles ◽  
Phonon Dispersion ◽  
Phonon Coupling

Phonon Dispersion in ZnSe

1972 ◽  
Vol 50 (21) ◽  
pp. 2596-2604 ◽  
Author(s):  
J. C. Irwin ◽  
J. LaCombe
Keyword(s):  
Experimental Data ◽  
Theoretical Model ◽  
Specific Heat ◽  
Single Crystals ◽  
Raman Spectra ◽  
Density Of States ◽  
Brillouin Zone ◽  
Critical Points ◽  
Phonon Dispersion ◽  
Zone Boundary

Second-order Raman spectra have been obtained from oriented single crystals of ZnSe. The spectra have been interpreted and the results have been used to determine the zone boundary frequencies at the critical points X, L, and W. The resulting set of frequencies are consistent with known polarization selection rules and with a theoretical model. The frequencies in turn serve to determine the parameters in the theoretical model and the resulting model has been used to calculate the phonon dispersion throughout the Brillouin zone, the density of states, and the specific heat. The results are compared to the small amount of experimental data that is available.

Darstellung und spektroskopische Charakterisierung von Tetrachloro- und Tetrabromo-Oxalatoiridaten(IV) / Preparation and Spectroscopical Characterization of Tetrachloro- and Tetrabromoiridates(IV)

1982 ◽  
Vol 37 (12) ◽  
pp. 1553-1557 ◽  
Author(s):  
H. Schulz ◽  
W. Preetz
Keyword(s):  
Aqueous Solution ◽  
Fine Structure ◽  
Absorption Spectra ◽  
Raman Spectra ◽  
Point Group ◽  
Vibration Modes ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Ir And Raman

On treatment of [IrX6]2- with oxalate in aqueous solution at first [IrX4OX]3- (X = Cl, Br) is formed, which after extraction with pentylammonium ions into CH2Cl2 can be oxidised by X2 to give the corresponding pure Ir(IV) complexes [IrX4OX]2-. The IR and Raman spectra are assigned according to point group C2V- The UV/VIS absorption spectra show strong CT bands of transitions from "(π + σ)tlu"- and "πt2U"-ligand niveaus to t2g5 (IrIV). These are split into three components by spin-orbit coupling and corresponding to the different groups of ligands: Xtr2, Xc2, ox. The spectrum of (TBA)2[IrBr4OX] recorded at 10 K is highly resolved, showing a splitting of the Brtr2 → Ir(IV) and Bc2 → Ir(IV) transitions by 1000-1400 cm-1. In the NIR-region two d-d-transitions are observed superimposed with a fine structure by coupling with vibration modes

Evolution of Raman Spectra in Ion Irradiated MoS2 Atomic Layers: Computational and Experimental Studies

2020 ◽  
Vol 20 (12) ◽  
pp. 7522-7529
Author(s):  
Tanmay Mahanta ◽  
Jyoti Shakya ◽  
Tanuja Mohanty
Keyword(s):  
Raman Spectra ◽  
Phonon Dispersion ◽  
Ion Irradiation ◽  
Computational Study ◽  
Experimental Studies ◽  
Heavy Ion ◽  
Peak Position ◽  
Acoustic Mode ◽  
Raman Spectroscopic ◽  
External Strain

Herein we report the existence of biaxial strain in swift heavy ion irradiated Molybdenum disulfide (Mos2) as confirmed from Raman spectroscopic measurement and computational study. Defect induced external strain modifies the electronic structure and phonon frequency of the material. In this work, chemically exfoliated Mos2 nanosheets have been exposed to 70 MeV Ni+7 ion irradiation from varying fluence. The Raman spectra reveal that the defect induced LA(M) peak (longitudinal acoustic mode of Phonon at M point) evolves linearly with ion fluence, besides that several other new peaks appear and become visible in Raman spectra thus relaxing Raman fundamental selection rule. Theoretically, simulated Phonon dispersion also supports the fact that tensile strain results in the red shifting of the Raman peak position. The increment of the defect induced LA(M) peak intensity with increasing ion fluence could be a measure of defect quantitatively. This study will be beneficial in the application of external strain to engineer properties of Mos2 as well as understanding the degree of strain inside it quantitatively.

Raman Spectra and the Phonon Dispersion of Polyglycine

1970 ◽  
Vol 52 (9) ◽  
pp. 4369-4379 ◽  
Author(s):  
Enoch W. Small ◽  
Bruno Fanconi ◽  
Warner L. Peticolas
Keyword(s):  
Raman Spectra ◽  
Phonon Dispersion

D-band Raman Spectra of Graphite and Single Wall Carbon Nanotubes

2001 ◽  
Vol 706 ◽  
Author(s):  
R. Saito ◽  
A. Grueneis ◽  
L. G. Cançcado ◽  
M. A. Pimenta ◽  
A. Jorio ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Raman Spectra ◽  
Phonon Dispersion ◽  
Resonance Raman ◽  
Dispersion Relations ◽  
Single Wall Carbon Nanotubes ◽  
Phonon Modes ◽  
Single Wall Carbon ◽  
Resonance Raman Spectra ◽  
Phonon Dispersion Relations

AbstractThe double resonance Raman spectra of the disorder-induced D-band and some other non-zone-center phonon modes are discussed for two-dimensional (2D) graphite and to some extent for single wall carbon nanotubes (SWNTs). The phonon dispersion relations of graphite can be determined using Raman spectroscopy b y measuring the non-zone center Raman phonon frequencies in combination with theoretically determined phonon q-vectors. We report a t of the phonon dispersion relations to experimental Raman spectra which were previously observed but have not y et been assigned to speci c phonon branches. We found that the D-band and the G0-band of 2D graphite consist of, respectively, two and one Raman Lorentzian peaks, while 3D graphite shows two G0-band Lorentzian peaks. The appearance of two G0 peaks in the resonance Raman spectra of SWNTs may come from resonances of one laser line with two di erent van Hov e singularities.

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