Distance- and spin-resolved spectroscopy of iridium atoms on an iron bilayer
Distance- and spin-resolved spectroscopy of iridium atoms on an iron bilayer
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DOI：
10.1103/physrevb.94.115418
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发表时间：
2016-09
影响因子：
3.7
通讯作者：
J. Schöneberg;N. M. Caffrey;P. Ferriani;S. Heinze;R. Berndt
中科院分区：
文献类型：
--
作者：
J. Schöneberg;N. M. Caffrey;P. Ferriani;S. Heinze;R. Berndt
用自旋极化扫描隧道显微镜研究了Ir原子在W（110）表面铁磁Fe双层膜上的诱导自旋极化。观察到自旋极化超过$60\phantom{\rule{0.16em}{0 ex}}%$的未占据态，其相对于Fe层反转。这种反转是由于隧穿能隙充当了轨道和自旋过滤器。距离相关的测量表明，自旋极化保持近似恒定的整个实验可访问的范围内，从远的隧道制度，从1 \AA{}的接触点形成。这是证实了密度泛函理论计算表明，自旋极化反转发生在0.5 \AA{}的吸附原子。
The induced spin polarization of Ir atoms on a ferromagnetic Fe double layer on W(110) has been investigated with spin-polarized scanning tunneling microscopy. An unoccupied state is observed with a spin polarization exceeding $60\phantom{\rule{0.16em}{0ex}}%$ that is inverted with respect to the Fe layer. This inversion is due to the tunneling gap acting as an orbital and spin filter. Distance dependent measurements show that the spin polarization remains approximately constant over the entire experimentally accessible range, from far in the tunneling regime to 1 \AA{} from the point of contact formation. This is corroborated by density functional theory calculations which show that the inversion of spin polarization occurs within 0.5 \AA{} of the adatom.