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Femtosecond Optical Detection of Quasiparticle Dynamics in Single-Crystal Bi2Sr2CaCu2O8+δ |
CAO Ning;WEI Yan-Feng;ZHAO Ji-Min;ZHAO Shi-Ping;YANG Qian-Sheng,
ZHANG Zhi-Guo;FU Pan-Ming |
| Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080 |
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CAO Ning, WEI Yan-Feng, ZHAO Ji-Min et al 2008 Chin. Phys. Lett. 25 2257-2260 |
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Abstract Quasiparticle dynamics of an optimally doped Bi2Sr2CaCu2O8+δ single crystal is investigated by the femtosecond pump--probe technique. Temperature
dependences of amplitude of the photoinduced differential reflectivity and the relaxation time show the evidence of strong phonon bottleneck. The experimental results are analysed by the Rothwarf--Taylor model.
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| Keywords:
78.47.+p
74.25.Gz
74.72.Hs
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Received: 22 November 2007
Published: 31 May 2008
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