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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 | 2000 |
| 形態種別 | 研究論文 |
| 標題 | Carrier concentrations in single crystals and their relation to the Hall coefficient and thermopower |
| 執筆形態 | その他 |
| 掲載誌名 | Physical Review B - Condensed Matter and Materials Physics |
| 巻・号・頁 | 61(22),pp.R14956-R14959 |
| 著者・共著者 | Yoichi Ando,Y. Hanaki,S. Ono,T. Murayama,Kouji Segawa,N. Miyamoto,Seiki Komiya |
| 概要 | We measured the thermopower S and the Hall coefficients (Formula presented) of (Formula presented) (BSLCO) single crystals in a wide doping range, in an effort to identify the actual hole concentrations per Cu, p, in this system. It is found that the “universal” relation between the room-temperature thermopower and (Formula presented) does not hold in the BSLCO system. Instead, comparison of the temperature-dependent (Formula presented) data with other cuprate systems is used as a tool to identify the actual p value. To justify this approach, we compare normalized (Formula presented) data of BSLCO, (Formula presented) (LSCO), (Formula presented) and (Formula presented) and demonstrate that the (Formula presented) data of the LSCO system can be used as a template for the estimation of p. The resulting phase diagram of p vs (Formula presented) suggests that (Formula presented) is anomalously suppressed in the underdoped samples, becoming zero at around (Formula presented) while the optimum (Formula presented) is achieved at (Formula presented) 0.16 as expected. © 2000 The American Physical Society. |
| DOI | 10.1103/PhysRevB.61.R14956 |
| ISSN | 1550-235X |
| PermalinkURL | https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=0001526252&origin=inward |