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セガワ コウジ
SEGAWA KOJI
瀬川 耕司 所属 京都産業大学 理学部 物理科学科 職種 教授 |
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| 言語種別 | 英語 |
| 発行・発表の年月 | 2006/01 |
| 形態種別 | 研究論文 |
| 標題 | Electronic inhomogeneity and breakdown of the universal thermal conductivity of cuprate superconductors |
| 執筆形態 | その他 |
| 掲載誌名 | PHYSICAL REVIEW LETTERS |
| 出版社・発行元 | AMER PHYSICAL SOC |
| 巻・号・頁 | 96(1) |
| 著者・共著者 | XF Sun,S Ono,Y Abe,S Komiya,K Segawa,Y Ando |
| 概要 | We report systematic, high-precision measurements of the low-T (down to 70 mK) thermal conductivity kappa of YBa2Cu3Oy, La2-xSrxCuO4, and Bi2Sr2CaCu2O8+delta. Careful examinations of the Zn- and hole-doping dependences of the residual thermal conductivity kappa(0)/T, as well as the in-plane anisotropy of kappa(0)/T in Bi2Sr2CaCu2O8+delta, indicate a breakdown of the universal thermal conductivity, a notable theoretical prediction for d-wave superconductors. Our results point to an important role of electronic inhomogeneities, which are not considered in the standard perturbation theory for thermal conductivity, in the underdoped to optimally doped regime. |
| DOI | 10.1103/PhysRevLett.96.017008 |
| ISSN | 0031-9007/1079-7114 |
| PermalinkURL | https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=32644483694&origin=inward |