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    题名: Unified Picture for Magnetic Correlations in Iron-Based Superconductors
    作者: Yin, Wei-Guo;Lee, Chi-Cheng;Ku, Wei
    日期: 2010-09-03
    上传时间: 2019-10-15 12:11:02 (UTC+8)
    摘要: The varying metallic antiferromagnetic correlations observed in iron-based superconductors are unified in a model consisting of both itinerant electrons and localized spins. The decisive factor is found to be the sensitive competition between the superexchange antiferromagnetism and the orbital-degenerate double-exchange ferromagnetism. Our results reveal the crucial role of Hund’s rule coupling for the strongly correlated nature of the system and suggest that the iron-based superconductors are closer kin to manganites than cuprates in terms of their diverse magnetism and incoherent normal-state electron transport. This unified picture would be instrumental for exploring other exotic properties and the mechanism of superconductivity in this new class of superconductors.
    關聯: Phys. Rev. Lett. 105(10), 107004
    DOI: 10.1103/PhysRevLett.105.107004
    显示于类别:[物理學系暨研究所] 期刊論文

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