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Enhanced Seebeck coefficient of quantum-confined electrons in SrTiO_3/SrTi_0.8Nb_0.2O_3 superlattices
http://hdl.handle.net/2237/11980
http://hdl.handle.net/2237/1198088b1b3cf-544e-4bb5-86ec-a82dde1ae73d
名前 / ファイル | ライセンス | アクション |
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2009-07-28 | |||||
タイトル | ||||||
タイトル | Enhanced Seebeck coefficient of quantum-confined electrons in SrTiO_3/SrTi_0.8Nb_0.2O_3 superlattices | |||||
言語 | en | |||||
著者 |
Mune, Yoriko
× Mune, Yoriko× Ohta, Hiromichi× Koumoto, Kunihito× Mizoguchi, Teruyasu× Ikuhara, Yuichi |
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アクセス権 | ||||||
アクセス権 | open access | |||||
アクセス権URI | http://purl.org/coar/access_right/c_abf2 | |||||
権利 | ||||||
言語 | en | |||||
権利情報 | Copyright (2007) American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. | |||||
抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | We report two-dimensional Seebeck coefficients (|S|_2D) of [(SrTiO_3)x/(SrTi_0.8Nb_0.2O_3)y]_20 (x=1–60, y=1–20) superlattices, which were grown on the (100) face of insulating LaAlO_3 substrates to clarify the origin of the giant |S|_2D values of the SrTiO_3 superlattices [H. Ohta et al., Nat. Mater. 6, 129 (2007)]. The |S|_2D values of the [(SrTiO_3)_17/(SrTi_0.8Nb_0.2O_3)y]_20 superlattices increased proportionally to y^{−0.5} and reached 320µVK^{−1} (y=1), which is approximately five times larger than that of the SrTi_0.8Nb_0.2O_3 bulk (|S|_3D=61µVK^{−1}). The slope of the log|S|_2D-log y plots was −0.5, proving that the density of states in the ground state for SrTiO_3 increases inversely proportionally to y. The critical barrier thickness for quantum electron confinement was also clarified to be 6.25nm (16 unit cells of SrTiO_3). | |||||
言語 | en | |||||
出版者 | ||||||
出版者 | American Institite of Physics | |||||
言語 | en | |||||
言語 | ||||||
言語 | eng | |||||
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資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | journal article | |||||
出版タイプ | ||||||
出版タイプ | VoR | |||||
出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
DOI | ||||||
関連タイプ | isVersionOf | |||||
識別子タイプ | DOI | |||||
関連識別子 | https://doi.org/10.1063/1.2809364 | |||||
ISSN | ||||||
収録物識別子タイプ | PISSN | |||||
収録物識別子 | 0003-6951 | |||||
書誌情報 |
en : APPLIED PHYSICS LETTERS 巻 91, p. 192105-192105, 発行日 2007-11-08 |
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値 | application/pdf | |||||
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値 | publisher | |||||
URI | ||||||
識別子 | http://dx.doi.org/10.1063/1.2809364 | |||||
識別子タイプ | DOI | |||||
URI | ||||||
識別子 | http://hdl.handle.net/2237/11980 | |||||
識別子タイプ | HDL |