论文标题
FE替换对URU $ _2 $ SI $ _2 $的电子结构的影响
Impact of Fe substitution on the electronic structure of URu$_2$Si$_2$
论文作者
论文摘要
在隐藏顺序（HO）复合uru $ _2 $ si $ _2 $中，压力以及将RU连续替换为Fe的替代导致了大型力矩反铁磁性阶段（LMAFM）的形成。在这里，我们研究了替代系列URU $ _ {2-X} $ fe $ _x $ _x $ si $ _2 $，$ x $ = 0.2和0.3，具有非共振的无弹性X射线散射（NIXS）和4 $ f $ core core core core core-f $ core-le级光电光谱，带有硬X射线（haxpes）。 NIXS表明，FE的替代对基层波函数的对称性没有影响。在haxpes中，我们发现光谱重量没有变化，这表明更改5 $ f $ - 电子计数。因此，由于替代而导致的交换交互的变化$ \ cal {j} $必须很小，以便猜想的化学压力似乎不太可能。讨论了一种替代方案，即由于替换引起的局部磁力增强在$ f $ - 电子离子附近的局部增强，而整体电子结构保持不变。
The application of pressure as well as the successive substitution of Ru with Fe in the hidden order (HO) compound URu$_2$Si$_2$ leads to the formation of the large moment antiferromagnetic phase (LMAFM). Here we have investigated the substitution series URu$_{2-x}$Fe$_x$Si$_2$ with $x$ = 0.2 and 0.3 with non-resonant inelastic x-ray scattering (NIXS) and 4$f$ core-level photoelectron spectroscopy with hard x-rays (HAXPES). NIXS shows that the substitution of Fe has no impact on the symmetry of the ground-state wave function. In HAXPES we find no shift of spectral weight that would be indicative for a change of the 5$f$-electron count. Consequently, changes in the exchange interaction $\cal{J}$ due to substitution must be minor so that the conjecture of chemical pressure seems unlikely. An alternative scenario is discussed, namely the formation of long range magnetic order due the substitution induced local enhancement of the magnetization in the vicinity of the $f$-electron ions while the overall electronic structure remains unchanged.
