Light And Matter Id Licht Und Materie Id
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Light And Matter Id Licht Und Materie Id
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Author : H. Bilz
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Light And Matter Id Licht Und Materie Id written by H. Bilz and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Science categories.
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.
Light And Matter Ic Licht Und Materie Ic
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Author : Hermann Haken
language : en
Publisher:
Release Date : 2014-01-15
Light And Matter Ic Licht Und Materie Ic written by Hermann Haken and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-01-15 with categories.
Fullerenes And Relative Materials
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Author : Natalia Kamanina
language : en
Publisher: BoD – Books on Demand
Release Date : 2018-04-25
Fullerenes And Relative Materials written by Natalia Kamanina and has been published by BoD – Books on Demand this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-04-25 with Science categories.
In the period of rapid and intensive development of general electronics, this book entitled Fullerenes and Relative Materials - Properties and Applications is quite systematic and useful. It considers some aspects on synthesis, structural, vibrational, tribology, and optical properties of the fullerenes and relative materials. Some parts of the book present the specific area of the applications of the studied nanostructures. The book contains eight chapters. The special approach and interesting results on the unique properties of the materials studied as well as the different areas of their applications in general optoelectronics, solar energy and gas storage, laser and display, and biomedicine are shown. It is important for education process and for the civil and special device operations.
Light And Matter Ii Licht Und Materie Ii
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Author : S. Flügge
language : de
Publisher: Springer
Release Date : 1959-01-16
Light And Matter Ii Licht Und Materie Ii written by S. Flügge and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 1959-01-16 with Science categories.
Theory Of Crystal Space Groups And Lattice Dynamics
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Author : J. L. Birman
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Theory Of Crystal Space Groups And Lattice Dynamics written by J. L. Birman and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Science categories.
Reissue of Encyclopedia of Physics/Handbuch der Physik, Vol. XXV/2b I am very pleased that my book is now to be reprinted and rebound in a new format which should make it accessible at a modest price to students and active researchers in condensed matter physics. In writing this book I had in mind an audience of physicists and chemists with no previous deep exposure to symmetry analysis of crystalline matter, non to the use of symmetry in simplifying and refining predictions of the results of optical experiments. Hence the book was written to explain and illustrate in all necessary detail how to: 1) describe the space group symmetry in terms of space group symmetry operations; 2) obtain irreducible representations and selection rules for optical infra-red and Raman and other transition processes. On the physical side I redeveloped the traditional theory of classical and quantum lattice dynamics, illustrating how space-time symmetry designations in the equations of motion can: 1) simplify and rationalize calculations of the classical eigenvectors of the dynamical equation; 2) permit classification of the eigenstates of the quantum lattice-dynamic pro blem; 3) give specific selection rules for optical infra-red and Raman lattice processes, and thus make "go, no-go" predictions including polarization of absorbed or scattered radiation; and 4) simplify the modern many-body theories of optical processes.
Licht Und Materie Ib
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Author :
language : en
Publisher:
Release Date : 1974
Licht Und Materie Ib written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1974 with Materials categories.
Light And Matter Ia Licht Und Materie Ia
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Author : L. Genzel
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Light And Matter Ia Licht Und Materie Ia written by L. Genzel and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Science categories.
159 elements only between states which differ in one of the single-electron wave functions, in short, HeR induces only one-electron transitions. The matrix elements 1mn and Pmn reduce to matrix elements between the single-electron wave functions. We are interested primarily in crystalline solids for which the band model is a good approximation. The Bloch single-electron wave function in this model has the form: N'I ili-';; U. r.;;) ( (1.14) ""nk r, =e nh\r , where n is the band index and U (r) has the periodicity of the lattice. The form of the Bloch function follows from the translational symmetry of the crystal, and the matrix elements between Bloch states are subject to the condition of wave-vector conservation: k'=k, for
Handbuch Der Physik
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Author :
language : de
Publisher:
Release Date : 1958
Handbuch Der Physik written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1958 with Optics categories.
Light And Matter Ic Licht Und Materie Ic
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Author : Hermann Haken
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-06-29
Light And Matter Ic Licht Und Materie Ic written by Hermann Haken and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-06-29 with Science categories.
The concept of the laser came into existence more than a decade ago when ScHAWLOW and TowNES showed that the maser principle could be extended to the optical region. Since then this field has developed at an incredible pace which hardly anybody could have foreseen. The laser turned out to be a meeting place for such different disciplines as optics (e.g. spectroscopy), optical pumping, radio engineering, solid state physics, gas discharge physics and many other fields. The underlying structure of the laser theory is rather simple. The main questions are: what are the light intensities (a), what are the frequencies (b), what fluctua tions occur (c), or, in other words, what are the coherence properties. Roughly speaking these questions are treated by means of the rate equations (a), the semiclassical equations (b), and the fully quantum mechanical equations (c), respectively. The corresponding chapters are written in such a way that they can be read independently from each other. For more details about how to proceed, the reader is advised to consult Chap. I.4.
Licht Und Materie Ib Light And Matter Ib
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Author : J.L. Birman
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-06-29
Licht Und Materie Ib Light And Matter Ib written by J.L. Birman and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-06-29 with Science categories.