Far Infrared Properties of Disordered SolidsCornell University, 1995 - 684 pages |
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Page 152
... excited state transition ( one in which the lower level of the transition is an excited state ) while all the others are ground state transitions . The symmetry of the Aa curves shown in part ( b ) indicates that the 9.4 cm - 1 and 27.7 ...
... excited state transition ( one in which the lower level of the transition is an excited state ) while all the others are ground state transitions . The symmetry of the Aa curves shown in part ( b ) indicates that the 9.4 cm - 1 and 27.7 ...
Page 312
... states of TLS's . ~ ( 3 ) In the spectral region from ~ 20 to 40 cm - 1 the fluorite mixed crystals show a temperature induced change in absorption which originates from the presence of excited state transitions to levels above the ground ...
... states of TLS's . ~ ( 3 ) In the spectral region from ~ 20 to 40 cm - 1 the fluorite mixed crystals show a temperature induced change in absorption which originates from the presence of excited state transitions to levels above the ground ...
Page 336
... excited state transition . The band grows in strength without appearing to either shift or broaden in frequency with increasing temperature . We have observed only two other doped calcium fluoride systems which contain excited state ...
... excited state transition . The band grows in strength without appearing to either shift or broaden in frequency with increasing temperature . We have observed only two other doped calcium fluoride systems which contain excited state ...
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-ยน 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