scholarly journals Effects of energy dependence in the quasiparticle density of states on far-infrared absorption in the pseudogap state

2005 ◽  
Vol 72 (13) ◽  
Author(s):  
S. G. Sharapov ◽  
J. P. Carbotte
Keyword(s):  
Energy Dependence ◽  
Density Of States ◽  
Infrared Absorption ◽  
Far Infrared ◽  
Pseudogap State ◽  
Quasiparticle Density

Infrared absorption due to H− ions in sodium and potassium halides. II. Impurity induced absorption in the far-infrared region

1970 ◽  
Vol 48 (24) ◽  
pp. 2917-2929 ◽  
Author(s):  
R. W. MacPherson ◽  
T. Timusk
Keyword(s):  
Absorption Spectrum ◽  
Density Of States ◽  
Infrared Absorption ◽  
Far Infrared ◽  
Infrared Region ◽  
Local Mode ◽  
Defect Model ◽  
Side Band ◽  
Sodium And Potassium ◽  
Potassium Halides

Measurements and calculations of the impurity induced far-infrared absorption due to H− ions in the sodium and potassium halides are presented. The defect model which was previously determined from theoretical fits to experimental local mode and anharmonic side band data is used to predict the absorption spectrum in the far-infrared region below the reststrahlen frequency. The agreement with the observed absorption spectra is good. It is shown that certain features may be interpreted as Van Hove singularities in the unperturbed density of states of the host crystals and that other peaks in the KBr and KI spectra are due to localized resonances.

A Semi-Quantitative Analysis of Far-Infrared Absorption in Dynamically Disordered Gallium Arsenide

2003 ◽  
Vol 17 (13n14) ◽  
pp. 783-787 ◽  
Author(s):  
M. A. Grado-Caffaro ◽  
M. Grado-Caffaro
Keyword(s):  
Experimental Data ◽  
Quantitative Analysis ◽  
Optical Absorption ◽  
Density Of States ◽  
Infrared Absorption ◽  
Mathematical Expression ◽  
Far Infrared ◽  
Structural Disorder ◽  
Infrared Range ◽  
Electronic Density

A mathematical expression for the coefficient of optical absorption in amorphous GaAs referred to the far-infrared range is obtained by neglecting the spectrum contribution corresponding to structural disorder. In addition, our results are compared with experimental data and several aspects related to the electronic density of states are discussed.

FAR INFRARED ABSORPTION IN ULTRAFINE AL PARTICLES DRUDE MODEL VERSUS GOR'KOV-ÉLIASHBERG THEORY

1977 ◽  
Vol 38 (C2) ◽  
pp. C2-93-C2-96 ◽  
Author(s):  
C. G. GRANQVIST ◽  
R. A. BUHRMAN ◽  
J. WYNS ◽  
A. J. SIEVERS
Keyword(s):  
Infrared Absorption ◽  
Far Infrared ◽  
Drude Model ◽  
Eliashberg Theory ◽  
Model Versus

Far-infrared absorption by small silver particles in gelatin

1990 ◽  
Vol 41 (11) ◽  
pp. 7421-7439 ◽  
Author(s):  
R. P. Devaty ◽  
A. J. Sievers
Keyword(s):  
Infrared Absorption ◽  
Far Infrared ◽  
Silver Particles

scholarly journals Constraints on the quasiparticle density of states in high- T c superconductors

2000 ◽  
Vol 52 (2) ◽  
pp. 203-209 ◽  
Author(s):  
T Cren ◽  
D Roditchev ◽  
W Sacks ◽  
J Klein
Keyword(s):  
Density Of States ◽  
Quasiparticle Density

Absolute Far‐Infrared Absorption Intensities of α‐Nitrogen

1969 ◽  
Vol 50 (12) ◽  
pp. 5177-5183 ◽  
Author(s):  
Robert V. St. Louis ◽  
O. Schnepp
Keyword(s):  
Infrared Absorption ◽  
Far Infrared
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