Magnetic excitations in the square-lattice iridate Ba2IrO4
Magnetic excitations in the square-lattice iridate Ba2IrO4
复制标题
方晶格铱酸盐 Ba2IrO4 中的磁激发
DOI：
10.1103/physrevb.107.054423
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发表时间：
2023
影响因子：
3.7
通讯作者：
Schlom, D. G.
中科院分区：
文献类型：
--
作者：
Clancy, J. P.;Gretarsson, H.;Lupascu, A.;Sears, J. A.;Nie, Z.;Upton, M. H.;Kim, Jungho;Islam, Z.;Uchida, M.;Schlom, D. G.
我们报告了一个共振非弹性x射线散射调查的外延薄膜，并比较其低能量的磁性和自旋轨道激发其姐妹化合物。由于Ir-O-Ir键的存在，磁振子和自旋轨道的带宽明显更大，使得很难将这两种激发描述为单独的定义明确的准粒子。这两种类型的激发被发现是相当敏感的外延应变的效果。此外，我们发现，所观察到的能级反转是不存在的，在最近的理论研究预测。我们的研究结果表明，的磁性能有很大的不同，这表明这些材料需要更仔细地检查与电子巡回考虑。
We report a resonant inelastic x-ray scattering investigation of ultrathin epitaxial films of, and compare their low-energy magnetic and spin-orbit excitations to those of their sister compound. Due to theIr-O-Ir bond, the bandwidth of the magnon and spin orbiton is significantly larger in, making it difficult to describe these two types of excitations as separate well-defined quasiparticles. Both types of excitations are found to be quite sensitive to the effect of epitaxial strain. In addition, we find that the-level inversion observed inis absent in, as predicted in recent theoretical studies. Our results illustrate that the magnetic properties ofare substantially different from those of, suggesting that these materials need to be examined more carefully with electron itinerancy taken into account.