论文标题
分层截风酸盐中的可调电子和磁相：应变后的SrRUO3-SRTIO3异质结构
Tunable electronic and magnetic phases in layered ruthenates: SrRuO3-SrTiO3 heterostructure upon strain
论文作者
论文摘要
分层截风形成是一类独特的系统，它表现出从竞争能量尺度出现的各种电子和磁性功能。这种特征的核心是多轨道物理学，尤其是轨道选择性行为。在这里，我们建议SRRUO3-SRTIO3异质结构是获得各种新兴属性的高度可调平台。采用密度功能理论加上动态均值场理论，我们彻底研究了系统的轨道依赖性物理，并确定竞争的磁波动。我们表明，外延应变将系统从洪德金属制度驱动到多轨或轨道选择性莫特阶段。同时，从与旋转密度波不稳定性的竞争中，两种不同类型的静态磁性稳定，铁磁和反铁磁性。
Layered ruthenates are a unique class of systems which manifests a variety of electronic and magnetic features emerged from competing energy scales. At the heart of such features lies the multi-orbital physics, especially, the orbital-selective behavior. Here, we propose that the SrRuO3-SrTiO3 heterostructure is a highly tunable platform to obtain the various emergent properties. Employing the density functional theory plus dynamical mean-field theory, we thoroughly investigate the orbital-dependent physics of the system and identify the competing magnetic fluctuations. We show that the epitaxial strain drives the system towards multi-orbital or orbital selective Mott phases from the Hund metal regime. At the same time, the two different types of static magnetism are stabilized, ferromagnetism and checkerboard antiferromagnetism, from the competition with the spin-density wave instability.
