Record Details

Title:
Monitoring ultrafast metallization in $LaCoO_3$ with femtosecond soft x-ray spectroscopy
Affiliation(s):
EuXFEL staff, Other
Author group:
Instrument SCS
Management Board
Sample Environment
Theory
Keyword(s):
Topic:
Scientific area:
Abstract:
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. $LaCoO_3$ is 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 $LaCoO_3$ using time-resolved soft x-ray reflectivity experiments. While the process is entangled at the Co $L_3$ edge, the time information of the different channels is decrypted at different resonant energies of the O K edge. 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 O K edge to understand correlated oxides.
Imprint:
Nature, 2019
Journal Information:
Communications Physics, 2 (1) (2019)
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Language(s):
English
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