A piezospectroscopic study of the Raman spectrum of α - quartz

Tekippe, V. J.; Ramdas, A. K.

doi:10.1016/0375-9601(71)90115-0

Cited by 19 publications

(23 citation statements)

References 2 publications

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“…According to experiments by Harker et al [52] and Tekippe et al [53] the sample volume change under uniaxial stress is smaller than that produced in hydrostatic pressure experiments [34,37]. For instance the first-order Raman shift of diamond shows a strong dependence on hydrostaticity, with very different pressure dependences observed under hydrostatic (dν Dia /dP is 2.96±0.05 cm −1 /GPa) and non-hydrostatic v Dia ¼ 1; 332:6 þ 1:294PÀ ð 0:0062P 2 Þ conditions [54].…”

Section: Discussionmentioning

confidence: 99%

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Raman-based geobarometry of ultrahigh-pressure metamorphic rocks: applications, problems, and perspectives

2010

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Raman-based geobarometry has recently become increasingly popular because it is an elegant way to obtain information on peak metamorphic conditions or the entire pressure-temperature-time (P-T-t) path of metamorphic rocks, especially those formed under ultrahigh-pressure (UHP) conditions. However, several problems need to be solved to get reliable estimates of metamorphic conditions. In this paper we present some examples of difficulties which can arise during the Raman spectroscopy study of solid inclusions from ultrahigh-pressure metamorphic rocks.

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Section: Discussionmentioning

confidence: 99%

“…The effect of uniaxial stress on Raman spectra of a single crystal of α-quartz was studied by Tekippe et al [53]. They found that Raman shifts of the most intense quartz bands at 1,081 and 464 cm −1 are about 1.5 and 3.7 cm −1 /GPa.…”

Section: Discussionmentioning

confidence: 99%

Raman-based geobarometry of ultrahigh-pressure metamorphic rocks: applications, problems, and perspectives

2010

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“…Using a perturbing Hamiltonian linear in strain, the secular equation is derived for phonons of each symmetry in terms of phenomenological 'deformation-potential constants'. 7 The secular equation can be diagonalized for a given direction of uniaxial stress to yield the eigenvalues and eigenvectors. The eigenvalues give splittings and the stress-induced frequency shifts.…”

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confidence: 99%

Effect of pressure and temperature on Raman spectra of solids: anharmonicity

Lucazeau

2003

J Raman Spectroscopy

270

222

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This paper gives a brief review of the effect of temperature and pressure on Raman spectra. Anharmonicity, defined by the cubic, quartic and higher terms in the potential expansion, is shown to be responsible for various properties such as dilatation or for variations of wavenumber and half-width of Raman bands with temperature and pressure, or may be strongly involved in phase transitions. This contribution does not pretend to be an exhaustive review on the subject but aims to introduce some basic concepts in a tutorial way before showing how intricated are these manifestations of anharmonicity. Copyright INTRODUCTIONProperties of materials are dependent on temperature and pressure. All applied research consists in studying the temperature and pressure dependence of their physical properties with a view to preparing the material to exhibit the expected properties in specific conditions of thermal and mechanical stress environment. Basic research consists in relating micro/meso-structural properties with the other physical properties. These relations exist via coupling coefficients which are often defined by a linear relationship. The present review presents the relations which govern the temperature and pressure dependence of the usual spectral parameters such as wavenumber, half-width and intensity of Raman bands. We shall point out the nonlinearity, also defined as anharmonicity, of the corresponding relationships. A tutorial and brief presentation of anharmonic effects in solids can be found in Chapter 8 of Ref. 1. As written by Sherman and Wilkinson, 2,3 in a completely harmonic approximation, where the force constant operating between any two masses is truly a constant and independent of the distance between the masses, the application of pressure would cause no observable frequency shift effects at all. The same statement can be done about the effect of temperature. However, as it becomes evident in the present special issue, this is not verified experimentally.Ł Correspondence to: Guy Lucazeau, LEPMI, (CNRS UMR 5631), Institut National Polytechnique de Grenoble, BP 75, F-38402 St. Martin d'Hères, Cedex, France. E-mail: guy.lucazeau@lepmi.inpg.fr † In memory of Evangelos Anastassakis, who should have been solicited for writing a review paper on such a subject.One of the aims of this paper is to point out that the measurements of temperature-or pressure-induced frequency shifts are measurements of the anharmonicity of the interactions that supply the restoring force constants. Let us point out that because pressure or temperature induces isotropic or anisotropic deformations of molecules and crystals, the pressure or stress-induced and the temperatureinduced frequency shifts  / are mainly determined by the associated deformation V/V. It is thus important to analyze the effects of temperature and pressure together. The origin of the deformation induced by these two external parameters is different. Pressure affects the equilibrium spacings between nuclei, distorts the electron clouds and through them...

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“…Finally, as no previous values were found, we cannot make any comparison, but the values found are in the same range as those reported in other crystals. 33,54 It may be noted that the e and f values obtained, except f A1TO2 , are all negative. This agrees with the common phonon behavior of moving to lower energies when external pressure is increased.…”

Section: Deformation Potential Constants or Piezospectroscopic Conmentioning

confidence: 81%

“…The first relates to materials used in microelectronics and micro electro-mechanical (MEMS) manufacturing, [21][22][23][24][25][26][27][28][29][30][31][32] and the other relates to photonic materials. [33][34][35][36] These photonic materials are used as bulk material for the generation of optical and electro-optical circuits. The rapidly increasing number of electronic technology requirements has been the main reason for there being far more studies in the first group than in the second one.…”

Section: 2mentioning

confidence: 99%

μ-Raman spectroscopy characterization of LiNbO3 femtosecond laser written waveguides

Tejerina

Jaque

Torchia

2012

Journal of Applied Physics

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In this paper, we present an iterative method which merges experimental l-Raman measurements and numerical simulations to describe femtosecond written waveguides in LiNbO 3 crystals. This method is based on the deformation potential theory, and uses the finite element method to analyze elastic deformations after femtosecond laser micro-explosions in x-cut Mg:LiNbO 3 crystals. The resultant strain and refractive index field after laser interaction were estimated and yielded similar values to those obtained in other works. The LiNbO 3 Raman deformation potential constants were also estimated in this work.

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A piezospectroscopic study of the Raman spectrum of α - quartz

Cited by 19 publications

References 2 publications

Raman-based geobarometry of ultrahigh-pressure metamorphic rocks: applications, problems, and perspectives

Raman-based geobarometry of ultrahigh-pressure metamorphic rocks: applications, problems, and perspectives

Effect of pressure and temperature on Raman spectra of solids: anharmonicity

μ-Raman spectroscopy characterization of LiNbO3 femtosecond laser written waveguides

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