Superconductivity in the (La,Ln)2-x(Ba,Sr)xCuO4 system

Mohan Ram, R. A. ; Ganguly, P. ; Rao, C. N. R. (1987) Superconductivity in the (La,Ln)2-x(Ba,Sr)xCuO4 system Phase Transitions, 10 (1-2). pp. 107-121. ISSN 0141-1594

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Several (La1-y Lny)2-x Srx(Bax)CuO4 systems show superconductivity in the 15-40K region. Marginal metallicity of the non-superconducting phases and the role of the nominal Cu3+ /Cu2+ ratio are discussed. Possible importance of hole-hole coupling (forming resonating O-O bonds) is indicated.

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