Electronic Polarizabilities and Photoelastic Behaviour of Ionic Crystals

Shanker, J.; Agrawal, G. G.; Dutt, N. V. K.

doi:10.1002/pssb.2221380102

Cited by 36 publications

(12 citation statements)

References 117 publications

(38 reference statements)

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“…[3][4][5][6][7][8] Furthermore, because of their special physical properties, AH's are used as optical window materials in various applications requiring a knowledge of the stress or density dependences of these properties. [9][10][11][12][13][14] In Sec.…”

Section: Introductionmentioning

confidence: 99%

Refractive index of the alkali halides. II. Effect of pressure on the refractive index of 11 alkali halides

et al. 1997

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A recently developed comparative interferometric method for the determination of the refractive index at high pressures is applied to NaF, NaBr, NaI, KCl, KBr, KI, RbCl, RbI, CsCl, CsBr, and CsI. In the studied pressure range up to 12 GPa, the potassium and rubidium halides show a polymorphic phase transition from NaCl-to CsCl-type structure, accompanied by a discontinuous increase of the refractive index. The pressure data of the sodium and cesium halides are converted from pressure to density dependences by the help of ultrasonic equations of state. The refractive index of the sodium halides shows an almost linear density dependence, while the cesium halides exhibit strong nonlinear behavior. The constant joint-density-of-states ͑CJDOS͒ model, proposed in the first paper of this series, is used for the further analysis of the data. In the CJDOS model the density dependence of the dielectric function is related to the different behaviors of s and d conduction bands with density. While the almost linear behavior of the sodium halides can be understood by a competition of an increasing contribution of transitions to the d bands, and a decreasing contribution of transitions to the s conduction band, the nonlinear behavior of the cesium halides is predominantly caused by the closure of the band gap, with a d-band character of the lower conduction-band states.

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Section: Introductionmentioning

confidence: 99%

Refractive index of the alkali halides. II. Effect of pressure on the refractive index of 11 alkali halides

et al. 1997

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“…It has been emphasized that there exist different viewpoint [19] regarding the change in polarizabilities from free state to the crystalline state. These viewpoints contradict each other and make the position disputable.…”

Section: Discussionmentioning

confidence: 99%

“…Values of electronic polarizabilities are changed significantly when the ions are transported into the crystalline state from the free state [19]. For explaining these changes in the polarizabilities several models with different physical origins have been developed.…”

Section: Comparison Of Free State and Crystalline State Polarizabilitiesmentioning

confidence: 99%

Analysis of Electronic Polarizabilities in Ionic Crystals

Dikshit

Kumar

1991

Physica Status Solidi (b)

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The existing sets of additive electronic polarizabilities for alkali halides and alkaline earth chalcogenides are examined by evaluating the high frequency electronic dielectric constants and presenting a comparison with experimental data. The crystalline state values of polarizabilities are also compared with free ion values. Various physical effects responsible for changing the values of polarizabilities in the crystalline state are discussed. The differences in free state and crystalline state polarizabilities are investigated in terms of the classical model due to Havinga and quantum mechanical model due to Yamashita and Kurosawa.Existierende Sitze der additiven elektronischen Polarisierbarkeiten fur Alkalihalogenide und Alkalierdchalkogenide werden durch Berechnung der elektronischen Hochfrequenzdielektrizitatskonstanten und Vergleich mit experimentellen Werten untersucht. Die Werte der Polarisierbarkeiten des Kristallzustands werden auch mit den Werten der freien Ionen verglichen. Verschiedene physikalische Effekte, die fur die Anderung der Werte der Polarisierbarkeiten im kristallinen Zustand verantwortlich sind, werden diskutiert. Die Unterschiede der Polarisierbarkeiten des freien und des kristallinen Zustands werden mit dem klassischen Modell von Havinga und dem quantenmechanischen Modell von Yamashita und Kurosawa untersucht.

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“…The polarizabilities are important in the treatment of weakly interacting systems, atomic scattering processes, optical and dielectric properties (Chrissanthopoulos and Maroulis [1], Lim et al [2], Bonin and Kresin [3], Dikshit and Kumar [4], Shanker et al [5], Muller et al [6]). An extensive review on atomic polarizabilities has been given by Miller and Bederson [7].…”

Section: Introductionmentioning

confidence: 98%

The variation of multipole polarizability at the surface of alkaline earth oxides and sulfides

Al-Mulla

2005

Physica Status Solidi (b)

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PACS 68.35.Bs, 73.20.At, 77.22.Ej Multipole polarizabilities of O 2-and S 2-ions at the {100}, {110} and {111} surfaces of oxides and sulfides of rocksalt structure were calculated variationally using the Kirkwood-Pople-Schofield (KPS) approach, and the method of Parry of calculating the electrostatic potential in the surface region of an ionic crystal. These results including various effects such as relaxation and rumpling were compared with bulk values for these systems. The initial wavefunctions of Harker have been used in the calculations.

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Electronic Polarizabilities and Photoelastic Behaviour of Ionic Crystals

Abstract: Contents Zntroduction Fqsee-ion polurixabilities Crgstalline-state polayimbilities Effect of crystalline environment on electronic polarixabilities Relationship between polarixabilities and ionic radii Photoelustic bchaviour ConclusionsRefemnces l )

Cited by 36 publications

References 117 publications

Refractive index of the alkali halides. II. Effect of pressure on the refractive index of 11 alkali halides

Refractive index of the alkali halides. II. Effect of pressure on the refractive index of 11 alkali halides

Analysis of Electronic Polarizabilities in Ionic Crystals

The variation of multipole polarizability at the surface of alkaline earth oxides and sulfides

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