Thermoelectric power of isolated narrow bands in the presence of correlation effects

1976 ◽  
Vol 13 (4) ◽  
pp. 1855-1856 ◽  
Author(s):  
Adam Lewis
Keyword(s):  
Thermoelectric Power ◽  
Correlation Effects ◽  
Narrow Bands

Electron correlations in narrow energy bands. II. The degenerate band case

1964 ◽  
Vol 277 (1369) ◽  
pp. 237-259 ◽  
Keyword(s):  
Electron Correlations ◽  
Degenerate Electron ◽  
Correlation Effects ◽  
Energy Bands ◽  
Simplified Models ◽  
Band Theory ◽  
Van Vleck ◽  
Theory Solution ◽  
Narrow Bands ◽  
Band Case

In a previous paper a theory of correlation effects in narrow s -bands was described. In this paper a generalization of that theory applicable to narrow degenerate electron bands is developed. The theory is based upon the notion that in the case of narrow bands the most important correlations are those between electrons on the same atom. The solution obtained has the important property of going over into the ordinary band theory solution in the appropriate limit (no interaction) and the exact atomic (Heitler-London) solution in the opposite limit (zero band-width). In order to elucidate the general properties of the solution some simplified models are discussed, and the more elementary implications of the theory when applied to the d -bands of transition metals are indicated. A physical interpretation of the results of the theory is given; the physical picture which emerges is found to be closely related to a theory discussed earlier by Van Vleck.

Least-square refinement of structure parameters from CBED integrated intensities: application to determination of temperature factors in Y BA2CU3O7

1992 ◽  
Vol 50 (2) ◽  
pp. 1456-1457
Author(s):  
Kjersti Gjønnes ◽  
Jon Gjønnes
Keyword(s):  
Least Square ◽  
Measured Intensity ◽  
Structure Information ◽  
Accurate Temperature ◽  
Least Square Fit ◽  
Case Application ◽  
Integrated Intensities ◽  
Temperature Factors ◽  
Narrow Bands

Electron diffraction intensities can be obtained at large scattering angles (sinθ/λ ≥ 2.0), and thus structure information can be collected in regions of reciprocal space that are not accessable with other diffraction methods. LACBED intensities in this range can be utilized for determination of accurate temperature factors or for refinement of coordinates. Such high index reflections can usually be treated kinematically or as a pertubed two-beam case. Application to Y Ba2Cu3O7 shows that a least square refinememt based on integrated intensities can determine temperature factors or coordinates.LACBED patterns taken in the (00l) systematic row show an easily recognisable pattern of narrow bands from reflections in the range 15 < l < 40 (figure 1). Integrated intensities obtained from measured intensity profiles after subtraction of inelastic background (figure 2) were used in the least square fit for determination of temperature factors and refinement of z-coordinates for the Ba- and Cu-atoms.

What correlation effects are covered by density functional theory?

2000 ◽  
Vol 98 (20) ◽  
pp. 1639-1658 ◽  
Author(s):  
Yuan He, Jurgen Grafenstein, Elfi Kraka,
Keyword(s):  
Density Functional Theory ◽  
Density Functional ◽  
Correlation Effects ◽  
Functional Theory

Correlation effects in double ionization of magnesium atom

1999 ◽  
Vol 09 (PR6) ◽  
pp. Pr6-101-Pr6-103 ◽  
Author(s):  
S. El Ghazouani ◽  
P. A. Hervieux ◽  
C. Dal Cappello ◽  
J. Langlois
Keyword(s):  
Double Ionization ◽  
Correlation Effects ◽  
Magnesium Atom

DETERMINING THE APPARENT COST OF WATER FOR THERMOELECTRIC POWER PLANTS

2018 ◽  
Author(s):  
Achyut Paudel ◽  
Joshua Richey ◽  
Jason Quinn ◽  
Todd M. Bandhauer
Keyword(s):  
Thermoelectric Power ◽  
Power Plants ◽  
Thermoelectric Power Plants
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