Optical absorption of Ni and Pd particles: enhanced correlation interaction between conduction electrons

Anno, E.; Yamaguchi, Tsuyoshi

doi:10.1016/0039-6028(93)90566-3

Cited by 16 publications

(21 citation statements)

References 20 publications

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“…Since the broadening of the simulated OPRA is due to the damping, the agreement shows that the almost constant half-width is caused mainly by the damping, which is the same as that for the simulated OPRA. 4 Thus the disorder seems to have little effect on the almost constant half-width in this study.…”

Section: B Broadening Of the Opra Of Rh Island Filmsmentioning

confidence: 49%

“…The spectra of the Pd island films, prepared by the same method as that in this study, have almost agreed with the simulated spectra based on bulk optical constants. 4 These results show that chemical reactions such as oxidation hardly occur for Rh and Pd particles. Thus, in this study, the formation of a compound layer ͑such as oxide layer͒ on the particle surface is not taken into account.…”

Section: Resultsmentioning

confidence: 94%

“…In the dynamical state due to the incidence of light, strong correlation interaction acts between the conduction electrons because of such d character. 4 The broadening of the OPRA of Ni and Pd ͑Ref. 4͒ and fcc Co ͑Ref.…”

Section: B Broadening Of the Opra Of Rh Island Filmsmentioning

confidence: 99%

“…Evidence of such broadening is the fact that the half-width of the OPRA is almost constant irrespective of the particle-size distribution and the variety of particle shapes, and that the OPRA is temperature independent. 4 Also for the Rh island films, to understand the broadening, the OPRA and its half-width were investigated in relation to the particle-size distribution, the variety of particle shapes, and the temperature. As previously, 4,5 the half-width was obtained from the OPRA, not separated from the dips, because the separation method is not yet established, and this width was defined by 2⌫ 1/2 , where ⌫ 1/2 is half of the halfwidth at the low-energy flank.…”

Section: B Broadening Of the Opra Of Rh Island Filmsmentioning

confidence: 99%

“…4 On the basis of the electron-gas model, the difference in the correlation interaction is related to the difference in the conduction-electron density, and it is suggested that, in addition to the d character, the conduction-electron density contributes to the correlation interaction.…”

Section: Introductionmentioning

confidence: 99%

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Optical absorption of4dfcc transition-metal particles: Study of the contribution of the conduction-electron density to the correlation interaction

Anno

1996

Phys. Rev. B

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Optical plasma-resonance absorption of Rh island films consisting of Rh particles larger than about 15 Å 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.

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Section: B Broadening Of the Opra Of Rh Island Filmsmentioning

confidence: 49%

Section: Resultsmentioning

confidence: 94%

Section: B Broadening Of the Opra Of Rh Island Filmsmentioning

confidence: 99%

Section: B Broadening Of the Opra Of Rh Island Filmsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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