Far Infrared Properties of Disordered SolidsCornell University, 1995 - 684 pages |
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Page 141
... increasing temperature , without any apparent significant shift or broadening in frequency . The four bands are clearly present at 9 K and there is still a remnant of them even at 25 K. There is no evidence for any sharp features ...
... increasing temperature , without any apparent significant shift or broadening in frequency . The four bands are clearly present at 9 K and there is still a remnant of them even at 25 K. There is no evidence for any sharp features ...
Page 204
... higher frequency than the ground state , 0 → 1 , transition then as the temperature is raised from zero Kelvin , populating the higher energy states , new modes will occur at higher frequencies corresponding to the higher state ...
... higher frequency than the ground state , 0 → 1 , transition then as the temperature is raised from zero Kelvin , populating the higher energy states , new modes will occur at higher frequencies corresponding to the higher state ...
Page 208
... frequency of the main absorption band , with dopant ion , can be readily observed . A graph of center frequency ... higher frequency from one dopant to the other but they also exhibit a systematic decrease in strength . This correlation ...
... frequency of the main absorption band , with dopant ion , can be readily observed . A graph of center frequency ... higher frequency from one dopant to the other but they also exhibit a systematic decrease in strength . This correlation ...
Contents
Introduction | 7 |
Twolevel Systems in Fluorite Mixed Crystals | 9 |
Farinfrared Impurity Modes in Doped Alkaline Earth Fluoride | 125 |
Copyright | |
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Common terms and phrases
1.4 K absorption A. J. Sievers absorption bands Absorption coefficient cm-1 absorption spectra absorption strength amorphous materials Amorphous Solids annealed as-grown BaF2 CaF2 doped cell change in absorption Chem clusters cm-¹ cm-1 band concentration dependence concentration samples cryostat curves decrease defect structure degassed density dielectric constant distribution of TLS's dopant concentration dopant ion doped sample doublet energy-loss function excited state transitions far-ir absorption Figure fill fraction fluorite mixed crystals Frequency cm-1 frequency dependence fullerenes fullerite glass-like behavior H2O molecules heat treatment higher frequency higher temperatures increasing temperature ionic radius LaF3 lattice Lett librational longitudinal loss functions low concentration low frequency low temperature LST relation magnetic field measurements mixed crystal systems peak phonon Phys predicted quenched R3+ ions relaxation resonant mode reststrahlen shift in frequency shown in Fig solid spectrum symmetry temperature dependent absorption temperature induced change toluene transverse zero ZnS-diamond composites