BiOCuS: A new superconducting compound with oxypnictide-related structure

被引：25

作者：

Ubaldini, A. ^{[1
]}

Giannini, E. ^{[1
]}

Senatore, C. ^{[1
]}

van der Marel, D. ^{[1
]}

机构：

[1] Univ Geneva, Dept Phys Mat Condensee, CH-1211 Geneva, Switzerland

来源：

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 2010年 / 470卷

关键词：

Oxy-sulfide superconductors; PbO-based structure; Novel materials;

D O I：

10.1016/j.physc.2009.11.164

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The discovery of about 50 K superconductivity in the tetragonal Fe-based pnictides has stimulated the search for superconductivity in a wide class of materials with similar structure. Copper forms compounds isostructural to LaOFeAs. Single phase BiOCuS can be prepared by a solid state reaction at temperature lower than 500 degrees C from a mixture of Bi2O3, Bi2S3 and Cu2S. The samples have been characterized by means of EDX analysis, X-ray diffraction, magnetic and electrical measurements. The cell parameters are a = 3.8708 angstrom. c = 8.565 angstrom. Charge carrier doping can be realized either by F substitutions for 0, or by Cu off-stoichiometry. The latter doping route leads to the occurrence of superconductivity below T-c = 5.8 K. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：S356 / S357

页数：2

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