Effects of energy dependence in the electronic density of states on the far-infrared absorption in superconductors

1985 ◽  
Vol 31 (5) ◽  
pp. 2694-2699 ◽  
Author(s):  
B. Mitrović ◽  
M. A. Fiorucci
Keyword(s):  
Energy Dependence ◽  
Density Of States ◽  
Infrared Absorption ◽  
Far Infrared ◽  
Electronic Density ◽  
Electronic Density Of States

Effects of energy dependence in the electronic density of states on some superconducting properties

1983 ◽  
Vol 61 (5) ◽  
pp. 784-801 ◽  
Author(s):  
B. Mitrović ◽  
J. P. Carbotte
Keyword(s):  
Energy Dependence ◽  
Density Of States ◽  
Chemical Potential ◽  
Numerical Solutions ◽  
Tunneling Conductance ◽  
Eliashberg Equations ◽  
Electronic Density ◽  
Electronic Density Of States ◽  
Current Voltage ◽  
Current Voltage Characteristics

We study the influence of energy dependence in the electronic density of states (EDOS) on the single particle tunneling characteristics into a superconductor. The Migdal–Eliashberg equations generalized to the case of a nonconstant EDOS are derived. Three equations are involved, one for the gap, another for the renormalization function, and a new one for the chemical potential shift which does not appear in the conventional formulation. Numerical solutions of these equations are obtained, from which current voltage characteristics are calculated for a model EDOS. The "inversion" of the calculated tunneling conductance shows that the effects of the peaks in the EDOS, on the scale of several Debye energies are important and cannot necessarily be reproduced within the usual Eliashberg theory by working with some effective value of electron–phonon spectral density α2(ω)F(ω) and/or Coulomb parameter μ* without introducing unphysical features to these parameters.

Effects of energy dependence in the electronic density of states on some normal state properties

1983 ◽  
Vol 61 (5) ◽  
pp. 758-783 ◽  
Author(s):  
B. Mitrović ◽  
J. P. Carbotte
Keyword(s):  
Energy Dependence ◽  
Density Of States ◽  
Normal State ◽  
Impurity Scattering ◽  
Eliashberg Equations ◽  
Electronic Density ◽  
Electronic Density Of States ◽  
Electron Phonon Interaction ◽  
Normal State Properties ◽  
Energy Equations

We study the effects of energy dependence in the electronic density of states (EDOS) on the electron quasiparticle properties in the normal state. The Migdal–Eliashberg equations generalized to include a nonconstant EDOS are derived in the isotropic approximation. By numerical solution of the electron self-energy equations in the normal state, we assess the effect of the interplay of the energy dependence in the EDOS, the electron–phonon interaction, and/or elastic impurity scattering on the electron quasiparticle properties. Self-consistency requirements are fully discussed.

INFRARED ABSORPTION IN PARTIALLY DISORDERED K2CuCl4·2H2O-TYPE COMPOUNDS

2004 ◽  
Vol 18 (17) ◽  
pp. 909-911 ◽  
Author(s):  
M. A. GRADO-CAFFARO ◽  
M. GRADO-CAFFARO
Keyword(s):  
General Theory ◽  
Optical Absorption ◽  
Density Of States ◽  
Infrared Absorption ◽  
Point Of View ◽  
Infrared Range ◽  
Electronic Density ◽  
Electronic Density Of States ◽  
Approximate Relationship

An approximate relationship for the coefficient of optical absorption valid, in principle, for the infrared range, corresponding to K 2 CuCl 4·2 H 2 O -type compounds is derived from a model for electronic density of states. These compounds are assumed to be partially disordered from the point of view of the general theory of solids.

scholarly journals Incident Photon-Energy Dependence of the Electronic Density of States in Pd42.5Ni7.5Cu30P20 Metallic Glass

2005 ◽  
Vol 46 (12) ◽  
pp. 2803-2806 ◽  
Author(s):  
Shinya Hosokawa ◽  
Naohisa Happo ◽  
Hitoshi Sato ◽  
Masaki Taniguchi ◽  
Tetsu Ichitsubo ◽  
...  
Keyword(s):  
Metallic Glass ◽  
Energy Dependence ◽  
Density Of States ◽  
Photon Energy ◽  
Incident Photon Energy ◽  
Electronic Density ◽  
Incident Photon ◽  
Electronic Density Of States

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.

Search for hybridization gap in the electronic density of states in CeNiSb

1996 ◽  
Vol 79 (8) ◽  
pp. 6367 ◽  
Author(s):  
Latika Menon ◽  
S. K. Dhar ◽  
S. K. Malik ◽  
W. B. Yelon
Keyword(s):  
Density Of States ◽  
Electronic Density ◽  
Electronic Density Of States

STM study of the electronic density of states in the superconducting phase of Bi2Sr2CaCu2O8

1992 ◽  
Vol 82 (3) ◽  
pp. 171-175 ◽  
Author(s):  
Koichi Ichimura ◽  
Kazushige Nomura ◽  
Fujio Minami ◽  
Shunji Takekawa
Keyword(s):  
Density Of States ◽  
Superconducting Phase ◽  
Electronic Density ◽  
Electronic Density Of States
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