Strain-induced orbital-energy shift in antiferromagnetic RuO2 revealed by resonant elastic x-ray scattering
Strain-induced orbital-energy shift in antiferromagnetic RuO2 revealed by resonant elastic x-ray scattering
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DOI：
10.1103/physrevb.106.195135
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发表时间：
2022-11-18
影响因子：
3.7
通讯作者：
Singer，Andrej
中科院分区：
文献类型：
--
作者：
Gregory，Benjamin Z.;Strempfer，Joerg;Singer，Andrej
在其基态，长期以来被认为是一种普通的金属顺磁体。最近的中子和X射线衍射表明，块材是一个反铁磁体，温度高于300 K。此外，在低于2K的温度下，外延应变诱导了薄膜的超导电性.在这里，我们提出了一个共振弹性x射线散射研究的边缘应变薄膜表现出应变诱导超导。我们观察到的方位角调制的100布拉格峰符合散装。最值得注意的是，在应变薄膜显示超导性，我们观察到shift的理论向更高的能量。在较厚的松弛膜和具有不同应变方向的膜中，能量位移较小。我们的研究结果提供了进一步的证据的实用程序的外延应变作为一个调谐参数在复杂的氧化物。
In its ground state,was long thought to be an ordinary metallic paramagnet. Recent neutron and x-ray diffraction revealed that bulkis an antiferromagnet withabove 300 K. Furthermore, epitaxial strain induces superconductivity in thin films ofbelow 2 K. Here, we present a resonant elastic x-ray scattering study at theedge of the strainedfilms exhibiting the strain-induced superconductivity. We observe an azimuthal modulation of the 100 Bragg peak consistent with bulk. Most notably, in the strained films displaying superconductivity, we observe ashift of theorbitals to a higher energy. The energy shift is smaller in thicker, relaxed films and films with a different strain direction. Our results provide further evidence of the utility of epitaxial strain as a tuning parameter in complex oxides.