| Original Articles |
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Photoexcitation of Bipolaron in Conducting Polymers |
| LI Sheng1,2;LONG De-Shun1;SUN Xin1,2 |
| 1State Key Laboratory of Surface Science and Research Center for Theoretical Physics, Fudan University, Shanghai 200433
2China National Laboratory of Infrared Physics, Shanghai Institute of Applied Physics, Shanghai 200083
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| Cite this article: |
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LI Sheng, LONG De-Shun, SUN Xin 2002 Chin. Phys. Lett. 19 657-658 |
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Abstract We theoretically study the photoexcitation process in a conducting polymer with a non-degenerate ground state, where the carrier without spin is bipolaron. The dynamical simulation reveals a photoinduced phenomenon that a positive bipolaron is split into two polarons by absorbing one photon. The relaxation time of this photoinduced bipolaron-split is about 40 fs. It is predicted that this photoinduced phenomenon can be detected experimentally by observing the change of magnetic susceptibility.
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| Keywords:
33.90.+h
36.20.-r
32.80.Wr
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Published: 01 May 2002
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| PACS: |
33.90.+h
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(Other topics in molecular properties and interactions with photons)
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36.20.-r
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(Macromolecules and polymer molecules)
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32.80.Wr
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(Other multiphoton processes)
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