TY - JOUR
T1 - Ultrafast dynamics of photoinduced electronic phase modulation in ladder cuprate of Sr14-xCaxCu24O41
AU - Fukaya, R.
AU - Kunitomo, M.
AU - Okimoto, Y.
AU - Ishikawa, T.
AU - Onda, K.
AU - Koshihara, S.
AU - Yui, H.
AU - Sasagawa, T.
PY - 2012/2
Y1 - 2012/2
N2 - Ultrafast carrier dynamics caused by photoexcitation in quasi-one-dimensional two-leg ladder cuprate Sr4Ca 10Cu24O41 was investigated by the femtosecond reflection spectroscopy. After the photoexcitation along the leg direction, the transient reflectivity changes (ΔR/R) in the mid-infrared region showed instant decrease within 150 fs. The suppressed ΔR/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 ΔR/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.
AB - Ultrafast carrier dynamics caused by photoexcitation in quasi-one-dimensional two-leg ladder cuprate Sr4Ca 10Cu24O41 was investigated by the femtosecond reflection spectroscopy. After the photoexcitation along the leg direction, the transient reflectivity changes (ΔR/R) in the mid-infrared region showed instant decrease within 150 fs. The suppressed ΔR/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 ΔR/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.
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U2 - 10.12693/APhysPolA.121.310
DO - 10.12693/APhysPolA.121.310
M3 - Article
AN - SCOPUS:84857408144
SN - 0587-4246
VL - 121
SP - 310
EP - 312
JO - Acta Physica Polonica A
JF - Acta Physica Polonica A
IS - 2
ER -