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arXiv 0901.3847cond-mat.str-el
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自旋轨道耦合和电子关联在5d电子态基态性质中的作用

Role of spin orbit coupling and electron correlation in the ground state properties of 5d electronic states

Kalobaran Maiti

摘要:

电子相关强度被预测为弱的5d过渡金属氧化物,因此,在这些系统中观察到的各种异常的电子特性往往归因于大的自旋轨道相互作用强度。采用第一性原理方法,研究了在150 K以下具有铁磁相的绝缘体Y2 Ir 2 O 7的电子结构.结果显示上述两种范式的崩溃。自旋-轨道相互作用的作用被认为是边际在确定的基态属性的Y2 Ir 2 O 7。一个大的电子相关强度是必需的,以获得实验体光谱是一致的散装性能。

英文摘要:

Electron correlation strength is predicted to be weak in 5d transition metal oxides and hence, various anomalous electronic properties observed in these systems are often attributed to the large spin-orbit interaction strength. Employing first principles approaches, we studied the electronic structure of Y2Ir2O7, which is insulating and exhibits ferromagnetic phase below 150 K. The results reveal breakdown of both the above paradigms. The role of spin-orbit interaction is found to be marginal in determining the ground state properties of Y2Ir2O7. A large electron correlation strength is required to derive the experimental bulk spectrum that is consistent with the bulk properties.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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