WEKO3
アイテム
Positronium formation at 4H SiC(0001) surfaces
https://repo.qst.go.jp/records/80816
https://repo.qst.go.jp/records/8081679b87de3-dae9-4ae5-9edb-66efbb20dd4d
| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2020-10-27 | |||||
| タイトル | ||||||
| タイトル | Positronium formation at 4H SiC(0001) surfaces | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
| 資源タイプ | journal article | |||||
| アクセス権 | ||||||
| アクセス権 | metadata only access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
| 著者 |
Kawasuso, Atsuo
× Kawasuso, Atsuo× 河裾× Wada, Ken× 和田健× Miyashita, Atsumi× 宮下, 敦巳× Maekawa, Masaki× 前川, 雅樹× 飯田, 進平× 岩森, 大直× 長嶋, 泰之× Atsuo, Kawasuso× Ken, Wada× Atsumi, Miyashita× Masaki, Maekawa |
|||||
| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Positronium formation at 4H SiC(0001) surfaces were investigated upon the removal of natural oxide layers by hydrofluoric acid etching and heat treatment at 1000 K in ultra-high vacuum. Two types of positronium were observed in the positronium time-of-flight (PsTOF) measurements irrespective of conduction type and surface polarity. One type formed the major part of the PsTOF spectrum with a maximum energy of 4.7 ± 0.3 eV. This energy exceeded the theoretical value calculated with valence electrons. The PsTOF spectrum shape was different from those of metal surfaces, suggesting that the surface state electrons or conduction electrons need to be considered as the positronium source. Another positronium appeared at 1000 K in the tail of the PsTOF spectrum with a maximum energy of 0.2–0.5 eV. This thermally-assisted athermal positronium may be formed via the surface state positrons and electrons. |
|||||
| 書誌情報 |
Journal of Physics: Condensed Matter 巻 33, 号 3, p. 035006, 発行日 2020-10 |
|||||
| 出版者 | ||||||
| 出版者 | IOP Publishing | |||||
| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 0953-8984 | |||||
| DOI | ||||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | 10.1088/1361-648X/abbe7a | |||||
| 関連サイト | ||||||
| 識別子タイプ | URI | |||||
| 関連識別子 | https://iopscience.iop.org/article/10.1088/1361-648X/abbe7a | |||||
