High pressure synthesis of a new superconductor Sr2CuO2+xCl2-y induced by apical oxygen doping

Details High pressure synthesis of a new superconductor Sr2CuO2+xCl2-y induced by apical oxygen doping High pressure synthesis of a new superconductor Sr2CuO2+xCl2-y induced by apical oxygen doping

2005-02-18

arxiv.org/abs/cond-mat/0502449v1

Physics

Condensed Matter

Superconductivity

accepted by physica c

Scientific paper

10.1016/j.physc.2004.12.015

Using the apical oxygen doping mechanism, i.e. a partial substitution of divalence O for the monovalence Cl, a p-type oxychloride cuprate superconductor, Sr2CuO2+xCl2-y, was synthesized at high pressure high temperature. The x-ray diffraction refinement suggests the superconductor crystallizes into a 0201 structure with space group I4/mmm and lattice parameters being a=3.92A, c=15.6 A. The magnetic susceptibility as well as resistance measurements indicated that the bulk superconductivity with transition temperature 30K was achieved in the sample.

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