Ferromagnetism versus antiferromagnetism of the Cr(001) surface.
Ferromagnetism versus antiferromagnetism of the Cr(001) surface.
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Cr(001) 表面的铁磁性与反铁磁性。
DOI：
10.1103/physrevb.39.1392
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发表时间：
1989
期刊：
影响因子：
--
通讯作者：
P. Dederichs
中科院分区：
文献类型：
--
作者：
S. Blügel;Danilo Pescia;P. Dederichs
在自洽总能量计算的基础上，讨论了铬（001）表面的三种不同自旋排列：铁磁性、表面内部的$c(2\ifmmode\times\else\texttimes\fi{}2)$反铁磁性和单步分离的铁磁阶地之间的“拓扑”反铁磁性。发现$c(2\ifmmode\times\else\texttimes\fi{}2)$反铁磁构型在能量上是不利的。相反，拓扑反铁磁性与自旋分辨光发射观察到的无磁化和能量和角分辨光发射检测到的自旋分裂表面态的存在是相容的。
Three different spin arrangements for the (001) surface of Cr are discussed on the basis of self-consistent total-energy calculations: ferromagnetism, inside-the-surface $c(2\ifmmode\times\else\texttimes\fi{}2)$ antiferromagnetism, and "topological" antiferromagnetism between ferromagnetic terraces separated by single steps. The $c(2\ifmmode\times\else\texttimes\fi{}2)$ antiferromagnetic configuration is found to be energetically unfavorable. Instead, topological antiferromagnetism is compatible with both the absence of magnetization observed by spin-resolved photoemission and the existence of spin-split surface states detected by energy- and angular-resolved photoemission.