Physics – Condensed Matter – Materials Science
Scientific paper
2010-04-06
EPL, 92, 57007 (2010)
Physics
Condensed Matter
Materials Science
Scientific paper
10.1209/0295-5075/92/57007
We introduce a method to analyze the effect of hybridization by shifting corresponding atomic levels using external potentials. Based on this approach, we study perovskite ruthenates,\ and unambiguously identify that the covalency between the \textit{A}-site cation and O ion will modify the Ru-O hybridization and change the density of state at Fermi level, consequently affect 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 SrRuO$_{3}$, while it will decrease the Ru-O length and increase the band width significantly. Therefore, the magnetic ordering temperature will decrease monotonically with pressure.
Dong Jinming
Wan Xiangang
Zhou Jian
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