Polarized Raman scattering analysis of Cu2ZnSnSe4 and Cu2ZnGeSe4 single crystals

2013 ◽  
Vol 114 (19) ◽  
pp. 193514 ◽  
Author(s):  
M. Guc ◽  
S. Levcenko ◽  
V. Izquierdo-Roca ◽  
X. Fontané ◽  
E. Arushanov ◽  
...  
Keyword(s):  
Raman Scattering ◽  
Single Crystals ◽  
Polarized Raman

Polarized Raman scattering of impurity modes in beryllium-doped cubic boron nitride single crystals

2003 ◽  
Vol 82 (18) ◽  
pp. 2972-2974 ◽  
Author(s):  
Kenji Watanabe ◽  
Takashi Taniguchi ◽  
Hisao Kanda ◽  
Elena M. Shishonok
Keyword(s):  
Boron Nitride ◽  
Raman Scattering ◽  
Single Crystals ◽  
Cubic Boron Nitride ◽  
Impurity Modes ◽  
Polarized Raman

scholarly journals Phonons in MgB2 by polarized Raman scattering on single crystals

2001 ◽  
Vol 64 (14) ◽  
Author(s):  
J. Hlinka ◽  
I. Gregora ◽  
J. Pokorný ◽  
A. Plecenik ◽  
P. Kúš ◽  
...  
Keyword(s):  
Raman Scattering ◽  
Single Crystals ◽  
Polarized Raman

Polarized Raman Scattering Study of ZnGeP2 Single Crystals

1997 ◽  
Vol 484 ◽  
Author(s):  
Spirit Tlali ◽  
Howard E. Jackson ◽  
M. C. Ohmer ◽  
P. G. Schunemann ◽  
T. M. Pollak
Keyword(s):  
Raman Scattering ◽  
Single Crystals ◽  
Raman Spectra ◽  
Low Temperatures ◽  
High Quality ◽  
Crystal Orientations ◽  
Gradient Technique ◽  
Theoretical Predictions ◽  
Scattering Study ◽  
Polarized Raman

AbstractRaman scattering experiments on high quality ZnGeP2 single crystals grown by the seeded horizontal dynamic gradient technique have been carried out. Polarized Raman spectra were obtained in the backscattering geometry at both room and low temperatures for several crystal orientations and compared with group theoretical predictions. Raman spectra from as-grown and annealed samples display distinctive differences which were explored by utilizing two different excitation wavelengths: 514.3 nm and 632.8 nm; the observed differences are attributed to a surface interdiffuasion effect.

Polarized Raman scattering in single crystals of Nd0.7Sr0.3MnO3

Pramana ◽  
2002 ◽  
Vol 58 (5-6) ◽  
pp. 1013-1017 ◽  
Author(s):  
M Pattabiraman ◽  
G Rangarajan ◽  
Kwang-Yong Choi ◽  
P Lemmens ◽  
G Guentherodt ◽  
...  
Keyword(s):  
Raman Scattering ◽  
Single Crystals ◽  
Polarized Raman

scholarly journals Polarized Raman scattering study of PSN single crystals and epitaxial thin films

2015 ◽  
Vol 05 (02) ◽  
pp. 1550013 ◽  
Author(s):  
J. Pokorný ◽  
I. Rafalovskyi ◽  
I. Gregora ◽  
F. Borodavka ◽  
M. Savinov ◽  
...  
Keyword(s):  
Thin Films ◽  
Raman Scattering ◽  
Single Crystals ◽  
Scattered Light ◽  
Epitaxial Thin Films ◽  
Ferroelectric State ◽  
Relaxor State ◽  
Structural Differences ◽  
Scattering Study ◽  
Polarized Raman

This paper describes a detailed analysis of the dependence of Raman scattering intensity on the polarization of the incident and inelastically scattered light in PbSc 0.5 Nb 0.5 O 3 (PSN) single crystals and epitaxially compressed thin films grown on (100)-oriented MgO substrates. It is found that there are significant differences between the properties of the crystals and films, and that these differences can be attributed to the anticipated structural differences between these two forms of the same material. In particular, the scattering characteristics of the oxygen octahedra breathing mode near 810 cm-1 indicate a ferroelectric state for the crystals and a relaxor state for the films, which is consistent with the dielectric behaviors of these materials.

Vibrational Raman Scattering from high TC single Crystals

1987 ◽  
Vol 99 ◽  
Author(s):  
D. M. Krol ◽  
M. Stavola ◽  
L. F. Schneemeyer ◽  
J. V. Waszczak ◽  
W. Weber
Keyword(s):  
Chemical Composition ◽  
Raman Scattering ◽  
Single Crystals ◽  
Raman Spectra ◽  
Peak Position ◽  
High Tc ◽  
Stretching Vibration ◽  
Polarized Raman ◽  
Axial Stretching

ABSTRACTPolarized Raman spectra have been measured on single crystals of the high Tc materials A2BCu3Ox with A=Ba and Sr, B=Y and La and 6<x<7. The dependence of the 500 cm-i peak position (αzz)on chemical composition is in agreement with its assignment to the O(1) axial stretching vibration. The intensity of the 600 cm1 band, which has been ascribed to a defect induced Cu-O mode, strongly depends on the crystal preparation and resulting purity.

scholarly journals Raman scattering and luminescence in single crystals of the amino acid glycine C2H5NO2 with an admixture of croconic acid C5H2O5

2021 ◽  
Vol 2103 (1) ◽  
pp. 012070
Author(s):  
E V Balashova ◽  
A N Smirnov ◽  
Yu V Davydov ◽  
B B Krichevtsov ◽  
A N Starukhin
Keyword(s):  
Amino Acid ◽  
Raman Scattering ◽  
Single Crystals ◽  
Thin Plates ◽  
Excitation Wavelength ◽  
Scattering Spectra ◽  
Polarized Raman ◽  
Raman Scattering Spectra ◽  
532 Nm ◽  
Amino Acid Glycine

Abstract Single crystals of the amino acid glycine (Gly) C2H5NO2 doped with croconic acid (CA) C5H2O5 were synthesized by evaporation from an aqueous solution. The crystals grow in the form of hexagonal pyramids or thin plates. Analysis of polarized Raman scattering spectra (excitation wavelength of 532 nm) measured at room temperatures showed that crystals in the form of pyramids corresponded to γ-polymorph (γ-Gly), and crystals in the form of plates to α-polymorph of glycine (α - Gly). The presence of croconic acid molecules in the crystals is confirmed by the change in their color from white in pure Gly crystals to light or dark yellow, characteristic of CA crystals, as well as the presence of weak lines corresponding to CA in the Raman spectra. In single crystals of both Gly:CA polymorphs, strong green luminescence significantly exceeding the intensity of Raman scattering is observed in the range 400 - 700 nm with a maximum at 510 nm (2.44 eV) upon excitation at λ= 325 nm.

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