Pressure dependence of the electron-phonon interaction and Fermi-surface properties of Al, Au, bcc Li, Pb, and Pd

1985 ◽  
Vol 32 (4) ◽  
pp. 2200-2212 ◽  
Author(s):  
B. Sundqvist ◽  
J. Neve ◽  
Ö. Rapp
Keyword(s):  
Fermi Surface ◽  
Surface Properties ◽  
Pressure Dependence ◽  
Phonon Interaction ◽  
Electron Phonon Interaction

scholarly journals Electron-phonon interaction in bulk Pb: Beyond the Fermi surface

2012 ◽  
Vol 85 (15) ◽  
Author(s):  
I. Yu. Sklyadneva ◽  
R. Heid ◽  
P. M. Echenique ◽  
K.-B. Bohnen ◽  
E. V. Chulkov
Keyword(s):  
Fermi Surface ◽  
Phonon Interaction ◽  
Electron Phonon Interaction

Electron–Phonon Scattering Times for Aluminum

1974 ◽  
Vol 52 (7) ◽  
pp. 618-623 ◽  
Author(s):  
P. T. Truant ◽  
J. P. Carbotte
Keyword(s):  
Fermi Surface ◽  
Phonon Spectrum ◽  
Phonon Scattering ◽  
Pure Aluminum ◽  
Phonon Interaction ◽  
Electron Phonon Interaction ◽  
Electron Phonon Scattering

The electron–phonon scattering times in pure aluminum vary with position on the Fermi surface. There are several sources of this anisotropy. Perhaps the most obvious, but not necessarily the most important, is the distortions of the Fermi surface from a sphere. Another results from the anisotropy in the electron–phonon interaction and in the phonon spectrum. We have calculated the effect on the electron–phonon scattering times of this latter source of anisotropy. We find large variations over the Fermi surface. As the temperature is increased the anisotropy reduces but it is still significant even above 100 K.

Pressure dependence of the electron-phonon interaction of Sn and Zr

1990 ◽  
Vol 74 (12) ◽  
pp. 1355-1358
Author(s):  
J. Sjöström ◽  
T. Jarlborg ◽  
Ö. Rapp
Keyword(s):  
Pressure Dependence ◽  
Phonon Interaction ◽  
Electron Phonon Interaction

Temperature and pressure dependence of the electronic structure of tetracyanoquinodimethane crystals and the effect of impurities

1985 ◽  
Vol 63 (12) ◽  
pp. 1513-1517 ◽  
Author(s):  
L. Roubi ◽  
C. Cyr ◽  
S. Desgreniers ◽  
C. Carlone ◽  
K. D. Truong ◽  
...  
Keyword(s):  
Pressure Dependence ◽  
Room Temperature ◽  
Phonon Interaction ◽  
Electron Phonon Interaction ◽  
First Case ◽  
Volume Dilatation ◽  
Structural Differences ◽  
Irreversible Effects ◽  
Effect Of Impurities ◽  
Temperature And Pressure

The absorption spectrum (12 500–32 260 cm−1) of tetracyanoquinodimethane crystals has been obtained at 0 bars in the [001] and [010] direction at 84 and 300 K. The peak of the Ag → Bu transition has been identified at 21 370 cm−1 and that of the Ag → Au transition at 22 000 cm−1. The change with temperature of both transitions was −3.4 ± 0.1 cm−1∙K−1. The [001] absorption was also obtained at room temperature as a function of the pressure, up to 5.0 × 104 bar, for crystals grown in two different laboratories, giving the change with pressure as −0.037 ± 0.003 and −0.092 ± 0.010 cm−1∙bar−1, respectively. At ambient temperature the explicit contribution, which is a measure of the electron–phonon interaction, was negative and dominated the temperature dependence. The implicit contribution, which is a measure of the volume dilatation, contributed in the opposite way, i.e., positively. Working at room temperature, we observed on both samples irreversible effects at higher pressures. In the first case, a discontinuous change occurred at (12 ± 1) × 103 bar, with new peaks appearing both at higher energy (25 600 cm−1) and lower energy (12 500 cm−1). In the second case, the absorption peak shifted continuously towards lower energies, but it broadened abruptly above 1.3 × 104 bar. We believe that the differences in the pressure dependence of the optical properties are due to the presence of small amounts of impurities in the samples causing subtle structural differences and that the irreversible effects are due to pressure-induced chemical changes.

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