Breakdown of Hund's rule for CuFeAs
Breakdown of Hund's rule for CuFeAs
复制标题
CuFeAs 洪德法则的分解
DOI:
10.1103/physrevb.103.125123
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发表时间:
2021-03
影响因子:
3.7
通讯作者:
Zhang Yu-Zhong
中科院分区:
文献类型:
--
作者:
Song Ze-Yi;Jiang Xiu-Cai;Ouyang Xiao-Fang;Zhang Yu-Zhong
The ground-state properties of CuFeAs were investigated by applying density functional theory calculations within the generalized gradient approximation (GGA) and $\mathrm{GGA}+U$. We find that the bicollinear antiferromagnetic state with antiparallel orbital magnetic moments on each iron which violates the Hund's rule is favored by the on-site Coulomb interaction, which is further stabilized by Cu vacancy. The magnetic ground state can be used to understand weak antiferromagnetism in CuFeAs observed experimentally. We argue that a breakdown of the Hund's rule may be the possible origin for reduced magnetism in iron pnictides, rather than magnetic fluctuations induced by electronic correlations.
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DOI:
10.1002/chin.200825008
发表时间:
2008-06
期刊:
ChemInform
影响因子:
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