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arXiv 0801.4787cond-mat.str-el
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铜铁矿CuFeO2的长程磁序和自旋-晶格耦合

Long-range magnetic order and spin-lattice coupling in the delafossite CuFeO2

Volker Eyert, Raymond Fresard, Antoine Maignan

摘要:

通过电子结构计算研究了铜铁矿CuFeO 2的电子和磁性。它们是使用密度泛函理论在广义梯度近似以及新的全势增广球面波方法。计算揭示了三种不同的自旋态在铁网站。考虑到正确的晶体结构,我们发现长程反铁磁有序与实验一致。与以前的工作相比,我们的计算表明,非局域交换相互作用导致半导体基态。

英文摘要:

The electronic and magnetic properties of the delafossite CuFeO2 are investigated by means of electronic structure calculations. They are performed using density functional theory in the generalized gradient approximation as well as the new full-potential augmented spherical wave method. The calculations reveal three different spin states at the iron sites. Taking into account the correct crystal structure, we find long-range antiferromagnetic ordering in agreement with experiment. Contrasting previous work, our calculations show that non-local exchange interactions lead to a semiconducting ground state.

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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