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Importance of Local Band Effects for Ferromagnetism in Hole-Doped La2CuO4 Cuprate Superconductors

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Published in Physical Review Letters. 2008, vol. 101, p. 157002
Abstract Band calculations for supercells of LaBaCuO4 show that the rigid band model for doping is less adequate than what is commonly assumed. In particular, weak ferromagnetism can appear locally around clusters of high Ba concentration. The clustering is important at large dilution, and averaged models for magnetism, such as the virtual crystal approximation, are unable to stabilize magnetic moments. These results give support to the idea that weak ferromagnetism can be the cause of the destruction of superconductivity at high hole doping.
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Research group Groupe Giamarchi
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BARBIELLINI-AMIDEI, Bernardo Gaetano, JARLBORG, Thomas N. Importance of Local Band Effects for Ferromagnetism in Hole-Doped La2CuO4 Cuprate Superconductors. In: Physical Review Letters, 2008, vol. 101, p. 157002. https://archive-ouverte.unige.ch/unige:35713

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Deposited on : 2014-04-15

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