| Item type |
デフォルトアイテムタイプ_（フル）(1) |
| 公開日 |
2023-03-18 |
| タイトル |
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タイトル |
Temperature dependence of the electronic structure of C60 films adsorbed on Si(001)-(2x1) and Si(111)-(7x7) surfaces |
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言語 |
en |
| 作成者 |
Sakamoto, Kazuyuki
Kondo, Daiyu
Ushimi, Yoshimitsu
Harada, Masashi
Kimura, Akio
Kakizaki, Akito
Suto, Shozo
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| アクセス権 |
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アクセス権 |
open access |
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アクセス権URI |
http://purl.org/coar/access_right/c_abf2 |
| 権利情報 |
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権利情報 |
Copyright (c) 1999 The American Physical Society. |
| 内容記述 |
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内容記述 |
We report here the temperature-dependent measurements of the valence spectra, the C 1s and the Si 2p core level spectra of the one monolayer C60 film adsorbed on Si(001)-(2x1) and Si(111)-(7x7) surfaces, using photoelectron spectroscopy. At 300 K, most C60 molecules are physisorbed with the coexistence of minority chemisorbed species on both Si(001)-(2x1) and Si(111)-(7x7) surfaces. After annealing the samples at 670 K, C60 molecules change the bonding nature to a chemisorption that has both covalent and ionic characters. The covalent bonding orbital is observed at a binding energy of 2.10 eV on both Si surfaces. The amount of charge transfer is estimated to be 0.19 electrons per C60 molecule on the Si(001) surface, and to be 0.21 electrons per molecule on the Si(111) surface. We consider the origin of the change in bonding nature to the different distance between two dangling bonds that results from the rearrangement of the surface Si atoms. After annealing at 1070 K, C60 molecules decompose and the SiC formation takes progress at the interface. On the Si(001) surface, the molecular orbitals (MO's) disappear at 1120 K and the binding energies of peaks observed in the valence spectra indicate the formation of SiC islands at this temperature. On the Si(111) surface, the disappearance of MO's and the formation of SiC islands are verified at 1170 K. The difference in formation temperature is attributed to the different surface structure. |
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言語 |
en |
| 出版者 |
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出版者 |
American Physical Society |
| 言語 |
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言語 |
eng |
| 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 |
| 出版タイプ |
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出版タイプ |
VoR |
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出版タイプResource |
http://purl.org/coar/version/c_970fb48d4fbd8a85 |
| 関連情報 |
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識別子タイプ |
DOI |
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関連識別子 |
10.1103/PhysRevB.60.2579 |
| 関連情報 |
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識別子タイプ |
DOI |
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関連識別子 |
http://dx.doi.org/10.1103/PhysRevB.73.094437 |
| 収録物識別子 |
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収録物識別子タイプ |
ISSN |
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収録物識別子 |
0163-1829 |
| 収録物識別子 |
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収録物識別子タイプ |
NCID |
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収録物識別子 |
AA11187113 |
| 開始ページ |
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開始ページ |
2579 |
| 書誌情報 |
Physical Review B - Condensed Matter and Materials Physics
Physical Review B - Condensed Matter and Materials Physics
巻 60,
号 4,
p. 2579-2591,
発行日 1999-01-25
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| 旧ID |
19369 |
PhysRevB_60_2579.pdf (393.7 KB)
