Ultrafast Dynamics of Photoinduced Electronic Phase Modulation in Ladder Cuprate of Sr_{14 - x}Ca_{x}Cu_{24}O_{41}

• Authors: R. Fukaya , M. Kunitomo , Y. Okimoto , T. Ishikawa , K. Onda , S. Koshihara , H. Yui , T. Sasagawa
• Languages of publication: EN

Abstracts

EN

Ultrafast carrier dynamics caused by photoexcitation in quasi-one-dimensional two-leg ladder cuprate Sr_4Ca_{10}Cu_{24}O_{41} was investigated by the femtosecond reflection spectroscopy. After the photoexcitation along the leg direction, the transient reflectivity changes (Δ R/R) in the mid-infrared region showed instant decrease within 150 fs. The suppressed Δ R/R increased so rapidly on the picosecond time scale that the reflectivity value finally became larger than that in the initial state. Such a successive response in Δ R/R, which was also observed in other photon energy regions, is discussed in terms of ultrafast variation of the Drude weight in the ladder system by the photoirradiation.

Keywords

EN

78.47.-p; 74.72.-h; 78.20.-e

Discipline

• 74.72.-h: Cuprate superconductors
• 78.47.-p: Spectroscopy of solid state dynamics
• 78.20.-e: Optical properties of bulk materials and thin films(for optical properties related to materials treatment, see 81.40.Tv; for optical materials, see 42.70-a; for optical properties of superconductors, see 74.25.Gz; for optical properties of rocks and minerals, see 91.60.Mk; for optical properties of specific thin films, see 78.66.-w)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2012
• Volume: 121
• Issue: 2
• Pages: 310-312

Dates

published

2012-02

Contributors

author

R. Fukaya

• CREST, Japan Science and Technology Agency (JST), Meguro-ku, Tokyo 152-8551, Japan
• Department of Materials Science, Tokyo Institute of Technology, Megro-ku, Tokyo 152-8551, Japan

author

M. Kunitomo

• CREST, Japan Science and Technology Agency (JST), Meguro-ku, Tokyo 152-8551, Japan

author

Y. Okimoto

• CREST, Japan Science and Technology Agency (JST), Meguro-ku, Tokyo 152-8551, Japan

author

T. Ishikawa

• CREST, Japan Science and Technology Agency (JST), Meguro-ku, Tokyo 152-8551, Japan

author

K. Onda

• Department of Environmental Chemistry and Engineering, Tokyo Institute of Technology, Yokohama, Kanagawa 226-8502, Japan

author

S. Koshihara

• CREST, Japan Science and Technology Agency (JST), Meguro-ku, Tokyo 152-8551, Japan
• Department of Materials Science, Tokyo Institute of Technology, Megro-ku, Tokyo 152-8551, Japan

author

H. Yui

• Materials and Structures Laboratory, Tokyo Institute of Technology, Yokohama, Kanagawa 226-8503, Japan

author

T. Sasagawa

• Materials and Structures Laboratory, Tokyo Institute of Technology, Yokohama, Kanagawa 226-8503, Japan

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Identifiers

DOI

10.12693/APhysPolA.121.310