Soliton Excitations in Halogen-Bridged Mixed-Valence Binuclear Metal Complexes
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概要
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Motivated by recent stimulative observations in halogen (X)-bridged binuclear transition-metal (M) complexes, which are referred to as MMX chains, we study solitons in a one-dimensional three-quarterfilled charge-density-wave system with both intrasite and intersite electron-lattice couplings. Two distinct ground states of MMX chains are reproduced and the soliton excitations on them are compared. In the weak-coupling region, all the solitons are degenerate to each other and are uniquely scaled by the band gap, whereas in the strong-coupling region, they behave differently deviating from the scenario in the continuum limit. The soliton masses are calculated and compared with those for conventional mononuclear MX chains.
- 2002-01-15
著者
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Yamamoto Shoji
Department Of Biological Chemistry And Crest (core Research For Educational Science And Technology)
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Ichioka Masanori
Department Of Physics Kyoto University
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