R.K. Wehner's Books

Light and Matter Id / Licht und Materie Id

Infrared and Raman Spectra of Non-Metals

By: H. Bilz,D. Strauch,R.K. Wehner

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Light and Matter Id / Licht und Materie Id

Infrared and Raman Spectra of Non-Metals

By: H. Bilz,D. Strauch,R.K. Wehner

The dynamical properties of solids have recently attracted renewed interest in connection with the increasing understanding of phase transitions and re lated phenomena. In particular, soft modes or, more generally, phonon 'anom alies' seem to play an important role in structural and electronic phase tran sitions, such as ferroelectric or superconducting transitions. The understanding of the mechanisms responsible for the occurrence of unusually low frequencies in phonon spectra requires a detailed analysis of the microscopic forces governing the lattice vibrations. Of particular importance is the influence of the electron lattice interaction in the adiabatic approximation which in many cases is the origin of peculiarities in the phonon self-energy. In this work the vibrational spectra of pure non-metals and of those con taining point defects are investigated. ' In these materials the interrelation be tween the pseudo-harmonic forces (determining the phonon dispersion re lations) and the non-linear anharmonic and electron-phonon forces (as they act in infrared and Raman spectra) is most obvious and can be quantitatively analysed in terms of appropriate models. The main task is to arrive at a physically correct treatment of electronic degrees of freedom, as for example in an electronic 'shell' model, which leads to the description of phonon spectra in terms of long-range polarizabilities and short-range deformabilities. The pur pose of our review is to stimulate further investigations which, we hope, will result in explicit relations between the parameters of the semi-microscopic models and the matrix elements from the electronic band structure.

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Page Count

614

Publisher

Springer Science & Business Media

Published Date

ISBN 10

3642464335

ISBN 13

9783642464331

Nuclear Magnetic Resonance Volume 5

By: R. K. Harris

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Nuclear Magnetic Resonance Volume 5

By: R. K. Harris

Annotation As a spectroscopic method, Nuclear Magnetic Resonance (NMR) has seen spectacular growth over the past two decades, both as a technique and in its applications. Today the applications of NMR span a wide range of scientific disciplines, from physics to biology to medicine. Each volume of Nuclear Magnetic Resonance comprises a combination of annual and biennial reports which together provide comprehensive of the literature on this topic. This Specialist Periodical Report reflects the growing volume of published work involving NMR techniques and applications, in particular NMR of natural macromolecules which is covered in two reports: "NMR of Proteins and Acids" and "NMR of Carbohydrates, Lipids and Membranes". For those wanting to become rapidly acquainted with specific areas of NMR, this title provides unrivalled scope of coverage. Seasoned practitioners of NMR will find this an in valuable source of current methods and applications. Specialist Periodical Reports provide systematic and detailed review coverage in major areas of chemical research. Compiled by teams of leading authorities in the relevant subject areas, the series creates a unique service for the active research chemist, with regular, in-depth accounts of progress in particular fields of chemistry. Subject coverage within different volumes of a given title is similar and publication is on an annual or biennial basis.

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Page Count

374

Publisher

Royal Society of Chemistry

Published Date

ISBN 10

0851862926

ISBN 13

9780851862927

Light and Matter Id / Licht und Materie Id

Infrared and Raman Spectra of Non-Metals

By: H. Bilz,D. Strauch,R.K. Wehner

Write a review Read reviews Take a Quiz Solve Book Puzzle

Light and Matter Id / Licht und Materie Id

Infrared and Raman Spectra of Non-Metals

By: H. Bilz,D. Strauch,R.K. Wehner

Average ratings

N/A

Write a review

Solve jigsaw puzzle

Age

Page Count

614

Publisher

Springer Science & Business Media

Published Date

ISBN 10

3642464335

ISBN 13

9783642464331

Book's by R.K. Wehner

Light and Matter Id / Licht und Materie Id

Light and Matter Id / Licht und Materie Id

Nuclear Magnetic Resonance Volume 5

Nuclear Magnetic Resonance Volume 5

Light and Matter Id / Licht und Materie Id

Light and Matter Id / Licht und Materie Id

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