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A magnetic analog of the isotope effect in cuprates

Rinat Ofer·Galina Bazalitsky·Amit Kanigel·Amit Keren·Assa Auerbach·James S. Lord·Alex Amato
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Abstract

We present extensive magnetic measurements of the (Ca_xLa_{1-x})(Ba_{1.75-x}La_{0.25+x})Cu_{3}O_{y} (CLBLCO) system with its four different families (x) having a Tc^max(x) variation of 28% and minimal structural changes. For each family we measured the Neel temperature, the anisotropies of the magnetic interactions, and the spin glass temperature. Our results exhibit a universal relation Tc=c*J*n_s for all families, where c~1, J is the in plane Heisenberg exchange, and n_s is the carrier density. This relates cuprate superconductivity to magnetism in the same sense that phonon mediated superconductivity is related to atomic mass.

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Rinat Ofer, Galina Bazalitsky, Amit Kanigel, Amit Keren, Assa Auerbach, James S. Lord, Alex Amato. 2006-08-08. A magnetic analog of the isotope effect in cuprates. https://doi.org/10.1103/physrevb.74.220508

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