1995 Fiscal Year Final Research Report Summary
DYNAMICS OF SOLITONS AND POLARONS IN QUASI-ONE-DIMENSIONAL HALOGEN-BRIDGED MIXED-VALENCE COMPOUNDS
| Project/Area Number |
06453047
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| Research Category |
Grant-in-Aid for General Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Inorganic chemistry
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| Research Institution | NAGOYA UNIVERSITY |
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Principal Investigator |
YAMASHITA Masahiro NGAGOYA UNIVERSITY,SCHOOL OF INFOMATICS AND SCIENCE,ASSOCIATE PROFESSOR, 情報文化学部, 助教授 (60167707)
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| Co-Investigator(Kenkyū-buntansha) |
OKAMOTO Hiroshi TOHOKU UNIVERSITY,RESEARCH INSTITUTE FOR SCIENTIFIC MEASUREMENTS,ASSOCIATE PROFE, 科学計測研究所, 助教授 (40201991)
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| Project Period (FY) |
1994 – 1995
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| Keywords | quasi-one-dimensional compounds / mixed-valence compounds / charge density wave / solitons and polarons / photo-induced absorption |
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| Research Abstract |
The effects of the electron-lattice coupling and the interchain interaction on the gap states in the one-dimensional Peierls-Hubbard system have been investigated by the photo-induced absorption (PA) measurements of the halogen-bridged metal complexes (the MX chains ; M=Pt and X=Cl, Br or I). In the complexes having small amplitude of CDW,three PA bands named al, a2, and b are observed. The PA bands a1 and a2, which are insensitive to the interchain interation, are assigned to polarons. The decrease of the interchain coupling of CDW leads to a midgap band b, which is attributable to charged-solitons, While, in the complexes having large amplitude of CDW,there are observed the two PA bands A and B having the long life time. Spectral shapes and excitation profiles of these PA bands are considerebly different from those of the al, a2, and b bands. These results suggestthat generation processes and stabilization energies of the gap states are strongly dependent on the magnitude of electron-lattice interactions.
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Research Products
(6 results)
