Monitoring ultrafast metallization in LaCoO3 with femtosecond soft x-ray spectroscopy
Monitoring ultrafast metallization in LaCoO3 with femtosecond soft x-ray spectroscopy
复制标题
使用飞秒软 X 射线光谱监测 LaCoO3 中的超快金属化
DOI：
10.1038/s42005-019-0109-9
复制
发表时间：
2019
影响因子：
5.5
通讯作者：
S. Molodtsov
中科院分区：
文献类型：
--
作者：
M. Izquierdo;M. Karolak;D. Prabhakaran;A. Boothroyd;A. Scherz;A. Lichtenstein;S. Molodtsov
超快动力学的研究是理解和控制相关氧化物性质的新工具。该工具通过增强某些特性和实现新的动态激励短语，为技术应用开辟了新的途径。lacoo3是一个典型的例子，其中由电子相关引起的强电子、自旋和晶格耦合导致低温自旋转变和高温半导体到金属的转变，这仍然没有完全被理解。在这里，我们使用时间分辨软x射线反射率实验来监测lacoo3中的超快金属化。当该过程在CoL3edge处纠缠时，不同信道的时间信息在OKedge的不同共振能量处被解密。金属化是通过瞬态电子、自旋和晶格分离发生的。我们的结果与热力学模型一致，并证明了在OKedge进行飞秒软x射线实验以了解相关氧化物的潜力。
The study of ultrafast dynamics is a new tool to understand and control the properties of correlated oxides. By enhancing some properties and realizing new dynamically excited phrases, this tool has opened new routes for technological applications. LaCoO3is one paradigmatic example where the strong electron, spin, and lattice coupling induced by electronic correlations results in a low-temperature spin transition and a high-temperature semiconductor-to-metal transition that is still not completely understood. Here, we monitor ultrafast metallization in LaCoO3using time-resolved soft x-ray reflectivity experiments. While the process is entangled at the CoL3edge, the time information of the different channels is decrypted at different resonant energies of the OKedge. Metallization is shown to occur via transient electronic, spin, and lattice separation. Our results agree with the thermodynamical model and demonstrate the potential of femtosecond soft x-ray experiments at the OKedge to understand correlated oxides.
影响因子：
8.6
作者：
Okimoto, Y.;Peng, X.;Itoh, M.
通讯作者：
Itoh, M.