论文标题
MN/W上的3 $ d $过渡金属ADATOM的电子和磁性特性（110）
Electronic and magnetic properties of 3$d$ transition-metal adatoms on Mn/W(110)
论文作者
论文摘要
使用密度函数理论，我们研究了$ 3D $过渡金属ADATOM的电子和磁性特性吸附在W上的MN的单层上（110）。 MN/W（110）具有非共线性环形旋转螺旋基态，其角度为173 $^\ circ $，在相邻Mn行的磁矩之间。它允许旋转吸附的磁性Adatom准连续性的自旋方向。因此，该表面非常适合操纵单个原子的自旋方向并使用扫描隧道显微镜（STM）探索其磁性。吸附的V和Cr过渡金属Adatoms在MN单层的最近邻居Mn原子上夫妇夫妇夫妇，而MN，FE，CO和NI夫妇在Ferromagnet上夫妇。 $ 3D $ adatoms的磁矩很大，显示出旺季的规则类型，系列中间是高峰。我们发现$ 3D $过渡金属的ADATOM的大型自旋分裂，在费米能量下最高73 \％的局部真空密度的大型自旋极化，以及对高达27 \％的各向异性磁极磁化的显着隧穿。我们得出的结论是，如此庞大的值源于单层的Adatoms和Mn原子之间的强杂交。此外，仅对于CO和V ADATOM，可以使用自旋偏置的STM鉴定ADATOM的自旋方向。
Using density functional theory, we investigate the electronic and magnetic properties of $3d$ transition-metal adatoms adsorbed on a monolayer of Mn on W(110). Mn/W(110) has a noncollinear cycloidal spin-spiral ground state with an angle of 173$^\circ$ between magnetic moments of adjacent Mn rows. It allows to rotate the spin orientation of an adsorbed magnetic adatom quasi-continuously. Therefore, this surface is ideally suited for manipulating the spin direction of individual atoms and exploring their magnetic properties using scanning tunneling microscopy (STM). The adsorbed V and Cr transition-metal adatoms couple antiferromagnetically to the nearest neighbor Mn atom of Mn monolayer while Mn, Fe, Co, and Ni couple ferromagnetically. The magnetic moments of the $3d$ adatoms are large and show a Hund's rule type of trend with a peak in the middle of the series. We find large spin splitting of the $3d$ transition-metal adatoms, large spin polarization of the local vacuum density of states up to 73\% at the Fermi energy, and significant tunneling anisotropic magnetoresistance enhancement up to 27\%. We conclude that such large values stem from the strong hybridization between the adatoms and the Mn atoms of the monolayer. Furthermore, identification of spin orientations of the adatom using spin-polarized STM is only possible for Co and V adatoms.
