Topology-induced spin frustrations at the Cr(001) surface studied by spin-polarized scanning tunneling spectroscopy
Topology-induced spin frustrations at the Cr(001) surface studied by spin-polarized scanning tunneling spectroscopy
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DOI：
10.1103/physrevlett.85.4606
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发表时间：
2000-11-20
影响因子：
8.6
通讯作者：
Wiesendanger, R
中科院分区：
文献类型：
--
作者：
Kleiber, M;Bode, M;Wiesendanger, R
利用接近费米能级的自旋极化表面态，利用自旋极化扫描隧道光谱研究了Cr（001）表面的磁性结构。在单原子台阶分离的不同铁磁台阶上测量的局部隧道光谱中，表面态峰强度的周期性变化证实了Cr（001）表面的拓扑反铁磁顺序。螺旋位错引起拓扑诱导的自旋受挫，导致形成宽度约为120nm的畴壁。
The magnetic structure of the Cr(001) surface was investigated by spin-polarized scanning tunneling spectroscopy by making use of the spin-polarized surface state located close to the Fermi level. Periodic alternations of the intensity of the surface state peak in local tunneling spectra measured above different ferromagnetic terraces separated by monatomic steps confirm the topological antiferromagnetic order of the Cr(001) surface. Screw dislocations cause topology-induced spin frustration, leading to the formation of domain walls with a width of about 120 nm.