Density functional study of LaFeAsO1-xFx:: A low carrier density superconductor near itinerant magnetism
Density functional study of LaFeAsO1-xFx:: A low carrier density superconductor near itinerant magnetism
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DOI：
10.1103/physrevlett.100.237003
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发表时间：
2008-06-13
影响因子：
8.6
通讯作者：
Du, M. -H.
中科院分区：
文献类型：
--
作者：
Singh, D. J.;Du, M. -H.
报道了26K超导LaFeAs（O，F）的密度泛函研究.我们发现一个低的载流子密度，高密度的状态，N（E（F）），和适度的声子频率相对于T（c）。高N（E（F））导致接近巡回磁性，具有竞争的铁磁和反铁磁波动，并且这些波动之间的平衡由掺杂水平控制。因此LaFeAs（O，F）是一类独特的高T（c）超导体：高N（E（F））离子金属。
Density functional studies of 26 K superconducting LaFeAs(O,F) are reported. We find a low carrier density, high density of states, N(E(F)), and modest phonon frequencies relative to T(c). The high N(E(F)) leads to proximity to itinerant magnetism, with competing ferromagnetic and antiferromagnetic fluctuations and the balance between these controlled by the doping level. Thus LaFeAs(O,F) is in a unique class of high T(c) superconductors: high N(E(F)) ionic metals near magnetism.