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    题名: Magnetic softness in iron-based superconductors
    作者: Yin, Wei-Guo;Lee, Chi-Cheng;Ku, Wei
    日期: 2012-07-17
    上传时间: 2019-10-10 12:10:40 (UTC+8)
    出版者: IOP Publishing
    摘要: We examine the relevance of several major material-dependent parameters to the magnetic softness in iron-based superconductors by means of first-principles electronic structure analysis of their parent compounds. The results are explained in the spin-fermion model where localized spins and orbitally degenerate itinerant electrons coexist and are coupled by Hund's rule coupling. We found that the difference in strength of the Hund's rule coupling term is the major material-dependent microscopic parameter for determining the ground-state spin pattern. The magnetic softness in iron-based superconductors is essentially driven by the competition between the double-exchange ferromagnetism and the superexchange antiferromagnetism.
    關聯: Supercond. Sci. Technol. 25, 084007
    DOI: 10.1088/0953-2048/25/8/084007
    显示于类别:[物理學系暨研究所] 期刊論文

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