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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 | 2005/08 |
| 形態種別 | 研究論文 |
| 査読 | 査読あり |
| 標題 | Constant effective mass across the phase diagram of high- Tc cuprates |
| 執筆形態 | その他 |
| 掲載誌名 | Physical Review B - Condensed Matter and Materials Physics |
| 掲載区分 | 国外 |
| 巻・号・頁 | 72(6) |
| 著者・共著者 | W. J. Padilla,Y. S. Lee,M. Dumm,G. Blumberg,S. Ono,Kouji Segawa,Seiki Komiya,Yoichi Ando,D. N. Basov |
| 概要 | We investigate the hole dynamics in two prototypical high temperature superconducting systems: La2-x Srx Cu O4 and Y Ba2 Cu3 Oy, using a combination of dc transport and infrared spectroscopy. By exploring the effective spectral weight obtained with optics in conjunction with dc Hall results, we find that the transition to the Mott insulating state in these systems is of the "vanishing carrier number" type since we observe no substantial enhancement of the mass as one proceeds to undoped phases. Further, the effective mass remains constant across the entire underdoped regime of the phase diagram. We discuss the implications of these results for the understanding of both transport phenomena and pairing mechanism in high- Tc systems. © 2005 The American Physical Society. |
| DOI | 10.1103/PhysRevB.72.060511 |
| ISSN | 1098-0121 |
| PermalinkURL | https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=33644534202&origin=inward |