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arXiv 1401.2277cond-mat.mtrl-sci
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FeAs的密度泛函理论研究:比较LDA+U、GGA+U与杂化泛函

A density functional theory study of FeAs comparing LDA+U, GGA+U and hybrid functionals

Sinéad M. Griffin, Nicola A. Spaldin

AI总结:

本研究利用LDA、LDA+U、GGA、GGA+U及杂化泛函计算FeAs的结构、磁性与电子性质,并结合实验比较以评估各泛函对FeAs及相关铁基磷族化物超导体的适用性。

摘要:

我们采用局域密度近似(LDA)、LDA+U、广义梯度近似(GGA)、GGA+U以及杂化泛函方法下的密度泛函理论,计算一砷化铁的性质。FeAs以MnP结构形成,因其在自旋电子学中的潜在应用以及作为新发现的磷族化物超导体的母体化合物而受到当前关注。我们将使用不同泛函得到的计算结构、磁性和电子性质彼此比较,并与实验比较,同时研究近期报道的磁螺旋的起源。我们的结果表明了各种泛函在描述FeAs及相关Fe-磷族化物超导体方面是否适当。

英文摘要:

We use density functional theory within the local density approximation (LDA), LDA+U, generalized gradient approximation (GGA), GGA+U, and hybrid-functional methods to calculate the properties of iron monoarsenide. FeAs, which forms in the MnP structure, is of current interest for potential spintronic applications as well as being the parent compound for the newly-identified pnictide superconductors. We compare the calculated structural, magnetic and electronic properties obtained using the different functionals to each other and to experiment, and investigate the origin of a recently-reported magnetic spiral. Our results indicate the appropriateness or otherwise of the various functionals for describing FeAs and the related Fe-pnictide superconductors.

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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