Unconventional Photonic Change of Charge-Density-Wave Phase in Two-Leg Ladder Cuprate Sr
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概要
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The photoinduced transition from the charge-density-wave (CDW) phase to the metallic phase in low-dimensional ladder-type cuprate Sr<inf>14</inf>Cu<inf>24</inf>O<inf>41</inf>was investigated in terms of femtosecond time-resolved reflection spectroscopy. Following the melting of the CDW order just after photoexcitation, a Drude-like metallic state was formed with a large optical response and maintained for more than 50 ps. The Drude weight increased with increasing fluence with threshold behavior as a result of the cooperative interactions in the CDW domains and reached the value of the Drude weight in the hole-doped metallic compound of Sr<inf>4</inf>Ca<inf>10</inf>Cu<inf>24</inf>O<inf>41</inf>. These results indicate the photoinduced formation of a similar metallic state driven by hole doping.
- 2013-08-15
著者
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OKIMOTO Yoichi
Department of Applied Physics, University of Tokyo
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Onda Ken
Internal Medicine Iii Azabu University School Of Veterinary Medicine
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Ishikawa Tadahiko
Department Of Applied Physics University Of Tokyo
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Sasagawa Takao
Materials and Structures Laboratory, Tokyo Institute of Technology, Yokohama 226-8503, Japan
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Koshihara Shin-ya
CREST, JST, Chiyoda, Tokyo 102-0076, Japan
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Fukaya Ryo
CREST, JST, Chiyoda, Tokyo 102-0076, Japan
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Kunitomo Miyako
Department of Chemistry and Materials Science, Tokyo Institute of Technology, Meguro, Tokyo 152-8551, Japan
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Isayama Akira
Materials and Structures Laboratory, Tokyo Institute of Technology, Yokohama 226-8503, Japan
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Onda Ken
Interactive Research Center of Science, Tokyo Institute of Technology, Yokohama 226-8502, Japan
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