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25 April 2024 |
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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
; | | Date: |
27 Jun 2006 | | Subject: | Superconductivity; Strongly Correlated Electrons | | 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. | | Source: | arXiv, cond-mat/0606695 | | Services: | Forum | Review | PDF | Favorites | |
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