论文标题
SR $ _2 $ ruo $ _4 $的竞争旋转 - 透明且通过外延菌株进行调整
Competing spin-fluctuations in Sr$_2$RuO$_4$ and their tuning through epitaxial strain
论文作者
论文摘要
在这项研究中，我们报告了在密度功能理论中采用广义BLOCH方法的SR2RUO4的磁能格局。我们确定了两个主要的磁性不稳定性，即铁磁和旋转密度波，以及其他主要的不稳定性。我们表明，外延应变可以改变系统的总体磁趋势，并调整系统中各种磁不稳定性的相对重量。尤其是，旋转密度波和铁磁不稳定性之间的平衡可以由应变控制，最终可以导致新的磁相以及可能改变配对通道的超导相。我们的发现与以前的理论模型和系统的各种磁性特征的实验报告进行了比较，并为它们提供了第一原理的解释。
In this study, we report the magnetic energy landscape of Sr2RuO4 employing the generalized Bloch approach within density functional theory. We identify the two dominant magnetic instabilities, ferromagnetic and spin-density-wave, together with other predominant instabilities. We show that epitaxial strain can change the overall magnetic tendency of the system, and tune the relative weight of the various magnetic instabilities in the system. Especially, the balance between spin-density wave and ferromagnetic instabilities can be controlled by the strain, and, eventually can lead to the new magnetic phases as well as superconducting phases with possibly altered pairing channels. Our findings are compared with previous theoretical models and experimental reports for the various magnetic features of the system and offer a first-principles explanation to them.
