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Journal Article

Photoinduced melting of the orbital order in La0.5Sr1.5MnO4 measured with 4-fs laser pulses

MPS-Authors
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Singla,  R.
Quantum Condensed Matter Dynamics, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;

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Simoncig,  A.
Extreme Timescales, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;

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Först,  M.
Quantum Condensed Matter Dynamics, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;

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Cavalieri,  A. L.
Extreme Timescales, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;

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Cavalleri,  A.
Quantum Condensed Matter Dynamics, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;
Department of Physics, Clarendon Laboratory, University of Oxford;

External Resource

http://dx.doi.org/10.1103/PhysRevB.88.075107
(Publisher version)

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PhysRevB.88.075107.pdf
(Publisher version), 711KB

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Citation

Singla, R., Simoncig, A., Först, M., Prabhakaran, D., Cavalieri, A. L., & Cavalleri, A. (2013). Photoinduced melting of the orbital order in La0.5Sr1.5MnO4 measured with 4-fs laser pulses. Physical Review B, 88(7): 075107. doi:10.1103/PhysRevB.88.075107.


Cite as: https://hdl.handle.net/11858/00-001M-0000-0019-8DCE-7
Abstract
By measuring time-dependent optical birefringence with 4-femtosecond (fs) laser pulses, we determine the time scale for photoinduced melting of orbital order in the single-layer manganite La0.5Sr1.5MnO4. Such high time resolution is required to distinguish atomic motions that control the Jahn-Teller distortion from even faster electronic rearrangements. The experiment reveals an 18 fs bottleneck for the loss of orbital order, corresponding to about one-quarter period of the in-plane Jahn-Teller mode. Furthermore, we observe coherent oscillations of this Jahn-Teller mode. Both their amplitude and the birefringence drop exhibit a threshold in their fluence dependence, indicating cooperativity in the lattice response.