scholarly journals Theory of the magnetization and exchange-enhanced susceptibility of alloys. I. Zero-temperature susceptibility of paramagnetic alloys in the random-phase approximation

1988 ◽  
Vol 37 (7) ◽  
pp. 3611-3625 ◽  
Author(s):  
Nicholas Kioussis ◽  
J. W. Garland ◽  
A. Gonis
Keyword(s):  
Random Phase Approximation ◽  
Random Phase ◽  
Phase Approximation ◽  
Zero Temperature ◽  
Temperature Susceptibility

Excitation spectrum of TTF-TCNQ: a finite temperature calculation

Open Physics ◽  
2013 ◽  
Vol 11 (1) ◽  
Author(s):  
Željana Lošić
Keyword(s):  
Excitation Spectrum ◽  
Finite Temperature ◽  
Random Phase Approximation ◽  
Random Phase ◽  
Phase Approximation ◽  
Organic Conductor ◽  
Zero Temperature ◽  
Good Qualitative Agreement ◽  
Temperature Dependent ◽  
Temperature Calculation

AbstractIn this paper we study the excitation spectrum of the organic conductor tetrathiafulvalene-tetracyanoquinodimethane (TTF-TCNQ) using finite temperature calculations. The effect of electronelectron interaction is considered within the random phase approximation (RPA). Our results show the temperature dependent plasmon and dipolar mode corresponding qualitatively to the modes obtained previously using zero temperature formalism assigned to the observed excitations at 10 meV and 0.75 eV. These modes have an essential influence on the energy-loss function. The obtained results are in good qualitative agreement with the optical and EELS data of TTF-TCNQ.

High-temperature susceptibility of a Heisenberg ferromagnet using Green function theory

1968 ◽  
Vol 46 (12) ◽  
pp. 1502-1504 ◽  
Author(s):  
S. T. Dembinski
Keyword(s):  
High Temperature ◽  
Green Function ◽  
Random Phase Approximation ◽  
Function Theory ◽  
Random Phase ◽  
Heisenberg Ferromagnet ◽  
Zero Field ◽  
Phase Approximation ◽  
First Order ◽  
Temperature Susceptibility

A new first-order decoupling recently proposed, which gave very satisfactory results for the low-temperature magnetization of a Heisenberg [Formula: see text] ferromagnet, is used here to calculate the high-temperature zero-field susceptibility series. The results are close to those known from the random-phase-approximation decoupling.

Interpretation of Preferential Adsorption Using Random Phase Approximation Theory

1995 ◽  
Vol 60 (10) ◽  
pp. 1641-1652 ◽  
Author(s):  
Henri C. Benoît ◽  
Claude Strazielle
Keyword(s):  
Approximation Theory ◽  
Random Phase Approximation ◽  
Virial Coefficient ◽  
Random Phase ◽  
Second Virial Coefficient ◽  
Solvent Mixture ◽  
Gyration Radius ◽  
Thermodynamic Quantities ◽  
Phase Approximation ◽  
Preferential Adsorption

It has been shown that in light scattering experiments with polymers replacement of a solvent by a solvent mixture causes problems due to preferential adsorption of one of the solvents. The present paper extends this theory to be applicable to any angle of observation and any concentration by using the random phase approximation theory proposed by de Gennes. The corresponding formulas provide expressions for molecular weight, gyration radius, and the second virial coefficient, which enables measurements of these quantities provided enough information on molecular and thermodynamic quantities is available.

Neutrino reactions onC12by the quasiparticle random-phase approximation (QRPA)

2010 ◽  
Vol 81 (2) ◽  
Author(s):  
Myung-Ki Cheoun ◽  
Eunja Ha ◽  
Su Youn Lee ◽  
K. S. Kim ◽  
W. Y. So ◽  
...  
Keyword(s):  
Random Phase Approximation ◽  
Random Phase ◽  
Phase Approximation ◽  
Quasiparticle Random Phase Approximation
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