Abstract
We show evidence that the competition between the antiferromagetic metallic phase and the charge- and orbital-ordered insulating phase at the reentrant phase boundary of a layered manganite, La0.99Sr2.01Mn2O7, can be manipulated using ultrafast optical excitation. The time-dependent evolution of the Jahn-Teller superlattice reflection, which indicates the formation of the charge and orbital order, was measured at different laser fluences. The laser-induced enhancement and reduction the Jahn-Teller reflection intensity shows a reversal of sign between earlier (∼10 ns) and later (∼150 ns) time delays during the relaxation after photo excitation. This effect is consistent with a scenario whereby the laser excitation modulates the local competition between the metallic and the insulating phases.
Original language | English |
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Article number | 495602 |
Journal | Journal of Physics Condensed Matter |
Volume | 27 |
Issue number | 49 |
DOIs | |
State | Published - Nov 17 2015 |
Keywords
- Phase competition by light
- manganite bilayer
- ultrafast dynamics in correlated materials