Evolution of the electronic structure and correlations accompanied by suppression of itinerant ferromagnetism in Sr1-x(La0.5K0.5)xRuO3
Evolution of the electronic structure and correlations accompanied by suppression of itinerant ferromagnetism in Sr1-x(La0.5K0.5)xRuO3
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Sr1-x(La0.5K0.5)xRuO3 中电子结构和相关性的演化以及巡回铁磁性的抑制
DOI：
10.1103/physrevb.105.195122
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发表时间：
2022
影响因子：
3.7
通讯作者：
Yokoyama Makoto
中科院分区：
文献类型：
--
作者：
Kawasaki Ikuto;Fujimori Shin-ichi;Takeda Yukiharu;Yamagami Hiroshi;Rahmanto;Honma Yutoku;Matsuoka Kensuke;Yokoyama Makoto
我们对巡游铁磁体进行了软x射线光电子能谱实验，研究了电子态随掺杂浓度的变化。Ru衍生的相干部分的价谱发展显着增加，这可以解释由铁磁交换分裂的抑制。随着电子关联的进一步增加，这种发展被从相干部分到非相干部分的光谱权重转移所淹没。Rucore能级谱也证实了掺杂对电子相关效应的增强，即对屏蔽峰的抑制。相反的显着变化的Ruspectral强度的函数，价谱几乎不依赖于温度，并没有显示任何明显的变化，在整个磁转变温度，表明温度依赖的交换分裂不能解释一个简单的Stoner图片。我们比较了目前的光电子能谱结果与那些同构（和钙），并讨论了这些掺杂化合物之间的磁性差异的起源。
We have carried out soft x-ray photoemission experiments on itinerant ferromagnetto investigate how the electronic state varies with doping concentration. The Ru-derived coherent part of the valence spectra develops significantly with increasingfor, which can be explained by the suppression of the ferromagnetic exchange splitting. With further increasing, this development is overwhelmed by the spectral weight transfer from the coherent to the incoherent parts due to the electron correlation. The enhancement of the electron correlation effect with doping is also confirmed by the Rucore-level spectra as the suppression of the well-screened peak. In contrast to the remarkable variation of the Ruspectral intensity as a function of, the valence spectra hardly depend on temperature and do not show any noticeable change across the magnetic transition temperatures, indicating that the temperature dependence of the exchange splitting cannot be explained by a simple Stoner picture. We compare the present photoemission results with those for isostructural(and Ca) and discuss the origin of the difference in the magnetic property between these doped compounds.