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Light and Matter Id / Licht und Materie Id

Infrared and Raman Spectra of Non-Metals

  • Book
  • © 1984

Overview

Part of the book series: Handbuch der Physik Encyclopedia of Physics (HDBPHYS, volume 5 / 25 / 2 / 2d)

Part of the book sub series: Optik / Optics (PHYSIK 5)

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Table of contents (1 chapter)

Keywords

About this book

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.

Editors and Affiliations

  • Max-Planck-Institut für Festkörperforschung, Stuttgart, Germany

    Ludwig Genzel

Bibliographic Information

  • Book Title: Light and Matter Id / Licht und Materie Id

  • Book Subtitle: Infrared and Raman Spectra of Non-Metals

  • Authors: H. Bilz, D. Strauch, R. K. Wehner

  • Editors: Ludwig Genzel

  • Series Title: Handbuch der Physik Encyclopedia of Physics

  • DOI: https://doi.org/10.1007/978-3-642-46433-1

  • Publisher: Springer Berlin, Heidelberg

  • eBook Packages: Springer Book Archive

  • Copyright Information: Springer-Verlag Berlin Heidelberg 1984

  • Softcover ISBN: 978-3-642-46435-5Published: 10 March 2012

  • eBook ISBN: 978-3-642-46433-1Published: 06 December 2012

  • Series ISSN: 0085-140X

  • Series E-ISSN: 2197-4195

  • Edition Number: 1

  • Number of Pages: XIV, 602

  • Topics: Optics, Lasers, Photonics, Optical Devices

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