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| ファイル | 記述 | サイズ | フォーマット | |
|---|---|---|---|---|
| PhysRevB.78.233202.pdf | 156.4 kB | Adobe PDF | 見る/開く |
| タイトル: | Spatial distribution of carriers in SrTiO3 revealed by photoluminescence dynamics measurements |
| 著者: | Yasuda, Hideki Yamada, Yasuhiro  Tayagaki, Takeshi Kanemitsu, Yoshihiko   https://orcid.org/0000-0002-0788-131X (unconfirmed) |
| 著者名の別形: | 金光, 義彦 |
| キーワード: | Auger effect carrier density carrier lifetime electron-hole recombination photoluminescence strontium compounds vacancies (crystal) |
| 発行日: | Dec-2008 |
| 出版者: | American Physical Society |
| 誌名: | Physical Review B |
| 巻: | 78 |
| 号: | 23 |
| 論文番号: | 233202 |
| 抄録: | We report on the optical determination of the carrier-density profiles near surfaces in SrTiO3 crystals by means of photoluminescence (PL) dynamics measurements. The PL dynamics under band-to-band excitation depends strongly on the excitation photon energy for different optical penetration depths. In nondoped and Ar+-irradiated SrTiO3 crystals, we evaluate the depth profile of carriers near the surface based on the lifetime of the Auger recombination of electrons originating from oxygen vacancies with photocarriers. Our PL spectroscopy clarifies that in nondoped SrTiO3, the near-surface oxygen-deficient region is a few tens of nanometers in depth. |
| 著作権等: | c 2008 The American Physical Society |
| URI: | http://hdl.handle.net/2433/87347 |
| DOI(出版社版): | 10.1103/PhysRevB.78.233202 |
| 出現コレクション: | 学術雑誌掲載論文等 |
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