The electronic structures and magnetic properties of perovskite ruthenates from constrained orbital-hybridization calculations
The electronic structures and magnetic properties of perovskite ruthenates from constrained orbital-hybridization calculations
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约束轨道杂化计算钙钛矿钌酸盐的电子结构和磁性
DOI:
10.1209/0295-5075/92/57007
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发表时间:
2010-04
期刊:
影响因子:
--
通讯作者:
XG WAN
中科院分区:
文献类型:
--
作者:
XG WAN
We introduce a method to analyze the effect of hybridization by shifting the corresponding atomic levels using external potentials. Based on this approach, we study perovskite ruthenates, and unambiguously identify that the covalency between the A-site cation and the O ion modifies the Ru-O hybridization and change the density of state at the Fermi level, consequently affecting the magnetic properties significantly. We also study the effect of pressure and reveal that hydrostatic pressure has a small effect on the Ru-O-Ru bond angle of SrRuO3, while it decreases the Ru-O length and increase the band width significantly. Therefore, the magnetic-ordering temperature will decrease monotonically with pressure.
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