Ultrafast spectral weight transfer in RBaCo2O 6-δ (R=Sm, Gd, and Tb): Role of electronic correlation in a photoinduced phase transition

Y. Okimoto; T. Miyata; M. S. Endo; M. Kurashima; K. Onda; T. Ishikawa; S. Koshihara; M. Lorenc; E. Collet; H. Cailleau; T. Arima

doi:10.1103/PhysRevB.84.121102

Ultrafast spectral weight transfer in RBaCo₂O _6-δ (R=Sm, Gd, and Tb): Role of electronic correlation in a photoinduced phase transition

Y. Okimoto, T. Miyata, M. S. Endo, M. Kurashima, K. Onda, T. Ishikawa, S. Koshihara, M. Lorenc, E. Collet, H. Cailleau, T. Arima

Research output: Contribution to journal › Article

10 Citations (Scopus)

Abstract

We performed femtosecond reflection spectroscopy on a series of A-site ordered perovskite-type cobalt oxide RBaCo₂O_6-δ (R=Sm, Gd, and Tb) crystals, in which the electronic transfer was controlled by R. The transient reflectivity and the optical conductivity [σPI(ω)] obtained by a Kramers-Kronig analysis showed an ultrafast change within a time resolution (150 fs) at room temperature and the appearance of signals of a hidden state that were different from the high-temperature metallic state. The transferred spectral weight in σPI(ω) upon photoexcitation sensitively depended on the R species, indicating an important role of electronic correlation in the photoexcited state.

Original language	English
Article number	121102
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	84
Issue number	12
DOIs	https://doi.org/10.1103/PhysRevB.84.121102
Publication status	Published - Sep 30 2011
Externally published	Yes

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All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

Cite this

Okimoto, Y., Miyata, T., Endo, M. S., Kurashima, M., Onda, K., Ishikawa, T., ... Arima, T. (2011). Ultrafast spectral weight transfer in RBaCo₂O _6-δ (R=Sm, Gd, and Tb): Role of electronic correlation in a photoinduced phase transition. Physical Review B - Condensed Matter and Materials Physics, 84(12), [121102]. https://doi.org/10.1103/PhysRevB.84.121102

Ultrafast spectral weight transfer in RBaCo₂O _6-δ (R=Sm, Gd, and Tb) : Role of electronic correlation in a photoinduced phase transition. / Okimoto, Y.; Miyata, T.; Endo, M. S.; Kurashima, M.; Onda, K.; Ishikawa, T.; Koshihara, S.; Lorenc, M.; Collet, E.; Cailleau, H.; Arima, T.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 84, No. 12, 121102, 30.09.2011.

Research output: Contribution to journal › Article

Okimoto, Y, Miyata, T, Endo, MS, Kurashima, M, Onda, K, Ishikawa, T, Koshihara, S, Lorenc, M, Collet, E, Cailleau, H & Arima, T 2011, 'Ultrafast spectral weight transfer in RBaCo₂O _6-δ (R=Sm, Gd, and Tb): Role of electronic correlation in a photoinduced phase transition', Physical Review B - Condensed Matter and Materials Physics, vol. 84, no. 12, 121102. https://doi.org/10.1103/PhysRevB.84.121102

Okimoto, Y. ; Miyata, T. ; Endo, M. S. ; Kurashima, M. ; Onda, K. ; Ishikawa, T. ; Koshihara, S. ; Lorenc, M. ; Collet, E. ; Cailleau, H. ; Arima, T. / Ultrafast spectral weight transfer in RBaCo₂O _6-δ (R=Sm, Gd, and Tb) : Role of electronic correlation in a photoinduced phase transition. In: Physical Review B - Condensed Matter and Materials Physics. 2011 ; Vol. 84, No. 12.

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10.1103/PhysRevB.84.121102