Optical absorption of 4d fcc transition-metal particles: Study of the contribution of the conduction-electron density to the correlation interaction
著者
安濃, 英治
(Anno, Eiji)
上位タイトル
Physical Review B
Vol.53,
No.7
(1996.
2)
,p.4170-
4175
識別番号
ISSN
1098-0121
DOI
10.1103/PhysRevB.53.4170
抄録
Optical plasma-resonance absorption of Rh island films consisting of Rh particles larger than about 15 A in diameter has been measured in the photon energy region from 0.5 to 6.5 eV. Comparison of the broadening and the location of this absorption with those of Pd island films shows that the correlation interaction between conduction electrons is stronger in Pd than in Rh, and that the conduction-electron density n is lower in Pd than in Rh. The difference in the correlation interaction shows that there are factors contributing to the correlation interaction besides the d character of conduction electrons. Assuming that n contributes to the correlation interaction as in a well-known electron-gas model, in which the correlation interaction is strong at low electron density, we can qualitatively attribute the difference in the correlation interaction to the fact that the correlation interaction due to the contribution of n is stronger in Pd than in Rh because Pd has lower n than Rh. This suggests that n also contributes to the correlation interaction.
