| 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 |
Terahertz conductivity of localized photoinduced carriers in a Mott insulator YTiO3 at low excitation density, contrasted with the metallic nature in a band semiconductor Si |
|
言語 |
en |
| 作成者 |
Kitagawa, Jiro
Kadoya, Yutaka
Tsubota, M.
Iga, Fumitoshi
Takabatake, Toshiro
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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) 2007 IOP Publishing Ltd |
| 主題 |
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主題Scheme |
NDC |
|
主題 |
420 |
| 内容記述 |
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内容記述 |
We performed optical-pump terahertz-probe measurements of a Mott insulator YTiO3 and a band semiconductor Si using a laser diode (1.47 eV) and a femtosecond-pulse laser (1.55 eV). Both samples possess long energy-relaxation times (1.5 ms for YTiO3 and 15 mu s for Si); therefore, it is possible to extract terahertz complex conductivities of photoinduced carriers under equilibrium. We observed highly contrasting behaviour-Drude conductivity in Si and localized conductivity possibly obeying the Jonscher law in YTiO3. The carrier number at the highest carrier-concentration layer in YTiO3 is estimated to be 0.015 per Ti site. Anisotropic conductivity of YTiO3 is determined. Our study indicates that localized carriers might play an important role in the incipient formation of photoinduced metallic phases in Mott insulators. In addition, this study shows that the transfer-matrix method is effective for extracting an optical constant of a sample with a spatially inhomogeneous carrier distribution. |
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言語 |
en |
| 出版者 |
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出版者 |
IOP Publishing Ltd |
| 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 |
AO |
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出版タイプResource |
http://purl.org/coar/version/c_b1a7d7d4d402bcce |
| 関連情報 |
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|
識別子タイプ |
DOI |
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関連識別子 |
10.1088/0953-8984/19/40/406224 |
| 関連情報 |
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|
関連タイプ |
isVersionOf |
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|
識別子タイプ |
DOI |
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|
関連識別子 |
http://dx.doi.org/10.1088/0953-8984/19/40/406224 |
| 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 |
0953-8984 |
| 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 |
AA10672168 |
| 開始ページ |
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開始ページ |
406224 |
| 書誌情報 |
Journal of Physics-Condensed Matter
Journal of Physics-Condensed Matter
巻 19,
号 40,
p. 406224,
発行日 2007-10
|
| 旧ID |
21461 |
JPhys_19_406224.pdf (924.3 KB)
