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 2001/08
形態種別 研究論文
標題 Zn-doping effect on the normal-state charge transport in untwinned YBa2CU3O7-delta single crystals at low temperatures
執筆形態 その他
掲載誌名 PHYSICA C
出版社・発行元 ELSEVIER SCIENCE BV
巻・号・頁 357,pp.30-33
著者・共著者 K Segawa,Y Ando
概要 The in-plane normal-state resistivity rho (a) of Zn-doped untwinned YBa2Cu3O7-delta (YBCO) single crystals is measured down to low temperatures by suppressing superconductivity with magnetic fields up to 18 T. Zn impurities in the CuO2 planes are found to induce an unusual upturn in rho (a)(T) in "clean" samples with k(Gamma)l similar or equal to 7. Such an upturn is observed only in the samples with oxygen contents of y less than or equal to 6.75, which suggests that a metal-insulator crossover takes place at the oxygen content of y similar to 6.75 in YBCO. (C) 2001 Elsevier Science B.V. All rights reserved.
DOI 10.1016/S0921-4534(01)00188-5
ISSN 0921-4534
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