Light and Matter Id / Licht und Materie Id

Infrared and Raman Spectra of Non-Metals

H. Bilz, D. Strauch, R.K. Wehner (Autoren)

L. Genzel (Herausgeber)

Buch | Softcover

XIV, 602 Seiten

2012 | 1. Softcover reprint of the original 1st ed. 1984
Springer Berlin (Verlag)
978-3-642-46435-5 (ISBN)

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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.

Vibrational Infrared and Raman Spectra of Non-Metals.- A. Introduction.- B. Phonons in insulators.- C. Interaction of photons with matter.- D. Expansion theory of susceptibilities and polarizabilities.- E. Interpretation of experimental spectra.- F. Lattices with point defects.- G. Dynamical theory of interacting phonon systems.- H. Appendices.

Erscheint lt. Verlag	10.3.2012
Reihe/Serie	Handbuch der Physik Encyclopedia of Physics
Reihe/Serie	Optik / Optics
Zusatzinfo	XIV, 602 p.
Verlagsort	Berlin
Sprache	englisch
Maße	170 x 244 mm
Gewicht	1052 g
Themenwelt	Naturwissenschaften ► Physik / Astronomie ► Optik
Themenwelt	Technik ► Elektrotechnik / Energietechnik
Schlagworte	Absorption • Blende • defects • Dispersion • Infrarotspektroskopie • Licht • Light Scattering • Materie • Nichtmetall • phase transition • Raman-Effekt • scattering • semiconductor • Spectroscope • spectroscopy
ISBN-10	3-642-46435-1 / 3642464351
ISBN-13	978-3-642-46435-5 / 9783642464355
Zustand	Neuware