Enhancement of electronic inhomogeneities due to out-of-plane disorder in Bi2 Sr2 Cu O6+δ superconductors observed by scanning tunneling spectroscopy
Physical Review B - Condensed Matter and Materials Physics 74 巻 9 号
094503- 頁
2006 発行
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| ファイル情報(添付) | |
| タイトル ( eng ) |
Enhancement of electronic inhomogeneities due to out-of-plane disorder in Bi2 Sr2 Cu O6+δ superconductors observed by scanning tunneling spectroscopy
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| 作成者 |
Kashiwaya S.
Eisaki H.
Kashiwaya H.
Tsuchiura H.
Tanaka Y.
Fujita K.
Uchida S.
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| 収録物名 |
Physical Review B - Condensed Matter and Materials Physics
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| 巻 | 74 |
| 号 | 9 |
| 開始ページ | 094503 |
| 抄録 |
Nanoscale electronic inhomogeneity in optimally doped single-layer Bi2 Sr1.6 L0.4 Cu O6+δ, (L -Bi2201, L=La and Gd) as well as bilayer Bi2 Sr2 Ca Cu2 O8+δ (Bi2212), superconductors has been investigated by the low-temperature scanning-tunneling-microscopy and spectroscopy. The inhomogeneous gap structures are observed above and below Tc on Gd-Bi2201. Increasing the out-of-plane disorder which is controlled by mismatch of the ionic radius between Sr and Ln results in the enhancement of pseudogap region with suppressed coherence peaks in the conductance spectrum, making the gap average larger and the gap distribution wider. The degree of electronic inhomogeneity measured by the distribution width of the gap amplitude is shown to have a correlation with Tc in optimally doped Bi2201 and Bi2212.
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| NDC分類 |
物理学 [ 420 ]
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| 言語 |
英語
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| 資源タイプ | 学術雑誌論文 |
| 出版者 |
American Physical Society
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| 発行日 | 2006 |
| 権利情報 |
Copyright (c) 2006 American Physical Soceity
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| 出版タイプ | Version of Record（出版社版。早期公開を含む） |
| アクセス権 | オープンアクセス |
| 収録物識別子 |
[ISSN] 1098-0121
[DOI] 10.1103/PhysRevB.74.094503
[NCID] AA11187113
[DOI] http://dx.doi.org/10.1103/PhysRevB.74.094503
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