Photo-induced Insulator-Metal Transition in an Organic Conductor α-(BEDT-TTF)_2I_3(Condensed Matter : Electronic Structure, Electrical, Magnetic and Optical Properties)
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概要
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Photo-switching between a charge-ordered insulating (CO) state and a metallic (M) state has been successfully realized in an organic conductor α-(BEDT-TTF)_2I_3 at low temperatures. The large photocurrent induced by the pulsed laser excitation with a photon energy of 2.6 eV had two components. The fast-decaying component had a life time of 120 ns. The subsequent one rose slowly (after about 0.7 μs) and remained as long as an electric field above 470 V/cm was applied. The dependences of these two components on laser power, applied voltage, and the onset of pulsed voltage were examined. It has been clearly demonstrated that the second component has prominent thresholds for both laser power and voltage. For each component, the resistivity decreased by about seven orders of magnitude from about 4MΩ・cm to less than 0.4Ω・cm at 4K.
- 社団法人日本物理学会の論文
- 2005-02-15
著者
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NISHIO Yutaka
Department of Physics, Faculty of Science, Toho University
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KAJITA Koji
Department of Physics, Faculty of Science, Toho University
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KATO Reizo
RIKEN (The institute of Physical and Chemical Research)
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Nishio Y
Department Of Physics Faculty Of Science Toho University
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Nishio Yutaka
Department Of Chemistry Faculty Of Science Toho University
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Koyama K
Institute For Solid State Physics University Of Tokyo
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Kato R
Riken (the Institute Of Physical And Chemical Research) Jst-crest
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Kato Reizo
Riken
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Kajita Koji
Department Of Physics Faculty Of Science Toho University
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Koyama K
Institute For Solid State Physics University:(present)institute Of Materials Research Tohoku Univers
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Tajima N
Riken (the Institute Of Physical And Chemical Research)
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TAJIMA Naoya
RIKEN (The Institute of Physical and Chemical Research)
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Fujisawa Junichi
Riken
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Naka Nobuko
Riken:(present Address)department Of Applied Physics The University Of Tokyo
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Tajima Naoya
Riken
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Kajita K
Department Of Physics Faculty Of Science Toho University
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Ishihara Teruya
Riken
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Nishio Y
Osaka Univ. Toyonaka
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NAKA Nobuko
RIKEN:(Present address)Department of Applied Physics, The University of Tokyo
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Fujisawa Jun-ichi
RIKEN
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