论文标题
应变诱导的抗铁磁RUO2的轨道能移动，谐振弹性X射线散射揭示
Strain-induced orbital energy shift in antiferromagnetic RuO2 revealed by resonant elastic x-ray scattering
论文作者
论文摘要
长期以来，Ruo2在其基础状态下是普通的金属Paramagnet。最近的中子和X射线衍射表明，大量RUO2是一种反铁磁铁（AFM），TN以上300 k。此外，外生菌株在2K以下的RUO2薄膜中诱导了新型的超导性。在这里，我们在这里呈现了一个弹性的X射线散射（Rexs），在RU L2上进行了弹性的弹性散射（Rexs）。超导性。我们观察到与散装中的倾斜AFM一致的100 bragg峰的方位角调制。最值得注意的是，在表现出新型超导性的紧张膜中，我们观察到Ru eg轨道向更高能量的〜1 EV转移。具有不同应变方向的较厚，放松的薄膜和膜中的能量转移较小。我们的结果提供了进一步的证据表明，外延菌株作为复杂氧化物中的调谐参数的实用性。
In its ground state, RuO2 was long thought to be an ordinary metallic paramagnet. Recent neutron and x-ray diffraction revealed that bulk RuO2 is an antiferromagnet (AFM) with TN above 300 K. Furthermore, epitaxial strain induces novel superconductivity in thin films of RuO2 below 2 K. Here, we present a resonant elastic x-ray scattering (REXS) study at the Ru L2 edge of the strained RuO2 films exhibiting the strain-induced superconductivity. We observe an azimuthal modulation of the 100 Bragg peak consistent with canted AFM found in bulk. Most notably, in the strained films displaying novel superconductivity, we observe a ~1 eV shift of the Ru eg orbitals 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.
