- 著者
- Kasahara S. Watashige T. Hanaguri T. Kohsaka Y. Yamashita T. Shimoyama Y. Mizukami Y. Endo R. Ikeda H. Aoyama K. Terashima T. Uji S. Wolf T. von Lohneysen H. Shibauchi T. Matsuda Y.
- 出版者
- National Academy of Sciences
- 雑誌
- Proceedings of the National Academy of Sciences (ISSN:00278424)
- 巻号頁・発行日
- vol.111, no.46, pp.16309-16313, 2014-11
- 被引用文献数
- 315
「ボース・アインシュタイン凝縮に最も近い超伝導状態」を発見. 京都大学プレスリリース. 2014-11-05.
- 著者
- Kaminski A. Fretwell H. M. Norman M. R. Randeria M. Rosenkranz S. Chatterjee U. Campuzano J. C. Mesot J. Sato T. Takahashi T. Terashima T. Takano M. Kadowaki K. Li Z. Z. Raffy H.
- 出版者
- American Physical Society
- 雑誌
- Physical review B (ISSN:10980121)
- 巻号頁・発行日
- vol.71, pp.014517, 2005-01
- 被引用文献数
- 82 80
We examine the momentum and energy dependence of the scattering rate of the high-temperature cuprate superconductors using angle-resolved photoemission spectroscopy. The scattering rate is of the form a + bomega around the Fermi surface for under-and optimal doping. The inelastic coefficient b is found to be isotropic. The elastic term a, however, is found to be highly anisotropic for under-and optimally doped samples, with an anisotropy which correlates with that of the pseudogap. This is contrasted with heavily overdoped samples, which show an isotropic scattering rate and an absence of the pseudogap above Tc. We find this to be a generic property for both single-and double-layer compounds.
- 著者
- Sato T. Matsui H. Takahashi T. Ding H. Yang H.-B. Wang S.-C. Fujii T. Watanabe T. Matsuda A. Terashima T. Kadowaki K.
- 出版者
- American Physical Society
- 雑誌
- Physical review letters (ISSN:00319007)
- 巻号頁・発行日
- vol.91, no.15, pp.157003, 2003-10
- 被引用文献数
- 99 110
We report a systematic high-resolution angle-resolved photoemission spectroscopy on high-Tc superconductors Bi2Sr2Can-1CunO2n+4 (n=1–3) to study the origin of many-body interactions responsible for superconductivity. For n=2 and 3, a sudden change in the energy dispersion, so called “kink”, becomes pronounced on approaching (π,0) in the superconducting state, while a kink appears only around the nodal direction in the normal state. For n=1, the kink shows no significant temperature dependence even across Tc. This could suggest that the coupling of electrons with Q=(π,π) magnetic mode is dominant in the superconducting state for multilayered cuprates, while the interactions at the normal state and that of single-layered cuprates have a different origin.