Electronic Structures and Magnetism of CaFeAsH and CaFeAsF

Electronic Structures and Magnetism of CaFeAsH and CaFeAsF
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CaFeAsH 和 CaFeAsF 的电子结构和磁性

DOI:
10.7566/jpsj.84.054708
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发表时间:
2015-04
影响因子:
1.7
通讯作者:
Liu, Qingbo
Liu, Qingbo
中科院分区:
物理与天体物理4区
文献类型:
--
作者:
Wang, Guangtao;Shi, Xianbiao;Liu, Haipeng;Liu, Qingbo

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我们通过第一性原理计算研究了CaFeAsH和CaFeAsF的电子结构、磁性以及费米面(FS)嵌套。在非磁性(NM)态下,我们发现了强烈的费米面嵌套,这会引发磁性不稳定性和自旋密度波。
We studied the electronic structures, magnetism, and Fermi surface (FS) nesting of CaFeAsH and CaFeAsF by first-principles calculations. In the nonmagnetic (NM) states, we found strong FS nesting, which induces magnetic instability and a spin density wave (SDW). Our calculations indicate that the ground state of CaFeAsH and CaFeAsF is the stripe antiferromagnetic state. The calculated bare susceptibility χ0(q) peaked at the M-point and was clearly suppressed and became slightly incommensurate with both electron doping and hole doping for both materials.
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