| Item type |
学術雑誌論文 / Journal Article(1) |
| 公開日 |
2012-01-10 |
| タイトル |
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|
タイトル |
Two-dimensional plasmon in a metallic monolayer on a semiconductor surface: Exchange-correlation effects |
| 資源タイプ |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
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資源タイプ |
journal article |
| 著者 |
INAOKA, Takeshi
NAGAO, Tadaaki
HASEGAWA, Shuji
HILDEBRANDT, Torsten
HENZLER, Martin
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| 著者(機関) |
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|
値 |
Department of Materials Science and Technology, Faculty of Engineering, Iwate University |
| 著者(機関) |
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値 |
Institute for Materials Research, Tohoku University |
| 著者(機関) |
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値 |
Department of Physics, Graduate School of Science, University of Tokyo |
| 著者(機関) |
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値 |
Institut für Festkörperphysik der Universität Hannover |
| 著者(機関) |
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値 |
Institut für Festkörperphysik der Universität Hannover |
| 登録日 |
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|
日付 |
2012-01-10 |
| 書誌情報 |
Physical Review B
巻 66,
号 24,
p. 245320-1-245320-8,
発行日 2002-01-01
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| ISSN |
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収録物識別子タイプ |
ISSN |
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収録物識別子 |
1098-0121 |
| Abstract |
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内容記述タイプ |
Other |
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内容記述 |
Taking account of exchange-correlation (XC) effects, we investigate two-dimensional (2D) plasmons (PL’s) in a metallic monolayer on a semiconductor surface. The energy dispersion and the energy-loss intensity of the 2D PL are calculated in close relation to a recent experiment by high-resolution electron energy-loss spectroscopy. We evaluate the XC effects by using the local-field-correction theory and by comparing the calculated results among (i) the random-phase approximation, (ii) the Hartree-Fock approximation, and (iii) the approximation originally formulated by Singwi, Tosi, Land, and Sjölander. We determine the electron density n0 and the electron effective mass m* so that the results in (iii) accord with the experimental ones. Our calculations give a good description of the energy dispersion and the energy-loss intensity of the 2D PL and the PL decay due to single-particle excitations in the experiment. With an increase in wave number q, the exchange and correlation begin to lower the dispersion curve and make the 2D PL decay at a smaller q value. Our electron system has a high effective density, because it lies on a semi-infinite dielectric medium. However, owing to low dimensionality, the XC effects start to appear remarkably in the 2D PL with an increase in q. |
| 出版者 |
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出版者 |
American Physical Society |
| 権利 |
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権利情報 |
(C) 2002 The American Physical Society |
| DOI |
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関連タイプ |
isIdenticalTo |
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識別子タイプ |
DOI |
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関連識別子 |
10.1103/PhysRevB.66.245320 |
| 著者版フラグ |
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出版タイプ |
VoR |
|
出版タイプResource |
http://purl.org/coar/version/c_970fb48d4fbd8a85 |
prb-v66i24p245320.pdf (112.2 kB)
