Insulating ferromagnetism in La4Ba2Cu2O10: An ab initio wannier function analysis

被引：0

作者：

Ku, Wei ^{[1
]}

Rosner, H. ^{[1
]}

Pickett, W.E. ^{[1
]}

Scalettar, R.T. ^{[1
]}

机构：

[1] Department of Physics, University of California, Davis, CA 95616-8677, United States

来源：

| 2002年 / American Physical Society卷 / 89期

关键词：

Composition effects - Electron energy levels - Ferromagnetism - Insulation - Magnetic couplings - Microscopic examination - Neodymium compounds - Phase transitions - Pressure effects - Quantum theory;

D O I：

暂无

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学科分类号：

摘要：

Microscopic mechanisms of the puzzling insulating ferromagnetic (FM) order observed in La422 were identified based on calculated parameters of interactions between half-filled localized Wannier states (WSs). The long-omitted FM direct exchange was shown to overwhelm AF superexchange. The spatial distribution of the constructed low-energy all-electron WSs provided detailed insight into the exchange processes and the partial contribution of spin moment.

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