Prog. Theor. Phys. Vol. 60 No. 6 (1978) pp. 1611-1623
Inter-Atomic Interaction between Electrons. III
— Effect of Electron Correlation
Fukuoka Institute of Technology, Wajiro, Fukuoka 811-02
*Department of General Education, Tottori University, Tottori 680
**Department of Applied Physics, Faculty of Engineering, Nagoya University, Nagoya 464
(Received May 25, 1978)
The modification due to electron correlation of the effective exchange parameter I(q) in the q-dependent susceptibility are studied within the T-approximation in the presence of intra- and inter-atomic interactions. The expression for I(q) is obtained in the case of low electron density. It is divided into the RPA term \tildeI(q), in which the bare intra- and inter-atomic interactions are replaced by the modified ones, and a correction term Ic(q) which vanishes at q=0. The effective values of the electron interactions, in terms of which \tildeI(q) is described, are numerically calculated for the b.c.c. and f.c.c. structures. It is found that the important inter-atomic interactions are not so much reduced from their bare values by the correlation as the intra-atomic interaction is, and Ic(q) compensates somewhat the decreasing behavior of \tildeI(q) against q. In relation to our previous RPA analysis for I(q) in nickel, the q-dependence of I(q) is numerically evaluated. It is deduced from the result that the RPA analysis is not modified seriously by the correlation effect.
DOI : 10.1143/PTP.60.1611
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Citing Article(s) :
Progress of Theoretical Physics Vol. 61 No. 3 (1979) pp. 699-708
Effect of Inter-Atomic Interaction on Dynamic Susceptibility
Eijiro Haga, Tomohiko Kato and Tsuyoshi Aisaka