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
言語種別 英語
発行・発表の年月 2002/04
形態種別 研究論文
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
出版社・発行元 AMER PHYSICAL SOC
巻・号・頁 88(16),pp.4
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 0031-9007/1079-7114
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