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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 | 2002/04 |
| 形態種別 | 研究論文 |
| 査読 | 査読あり |
| 標題 | Magnetoresistance of untwinned YBa2Cu3Oy single crystals in a wide range of doping: Anomalous hole-doping dependence of the coherence length |
| 執筆形態 | その他 |
| 掲載誌名 | PHYSICAL REVIEW LETTERS |
| 掲載区分 | 国外 |
| 出版社・発行元 | AMER PHYSICAL SOC |
| 巻・号・頁 | 88(16),pp.1670051-1670054 |
| 著者・共著者 | Y Ando,K Segawa |
| 概要 | Magnetoresistance (MR) in the a -axis resistivity of untwinned YBa2Cu O-3(y) single crystals is measured for a wide range of doping (y = 6.45-7.0). The y dependence of the in-plane coherence length xi(ab) estimated from the fluctuation magnetoconductance indicates that the superconductivity is anomalously weakened in the 60-K phase; this observation, together with the Hall coefficient and the a -axis thermopower data which suggest the hole doping to be 12% for y similar or equal to 6.65, gives evidence that the origin of the 60-K plateau is the 1/8 anomaly. At high temperatures, the normal-state MR data show signatures of the Zeeman effect on the pseudogap in underdoped samples. |
| DOI | 10.1103/PhysRevLett.88.167005 |
| ISSN | 0031-9007 |
| PermalinkURL | https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=0037156880&origin=inward |