Properties of Bipolaron System
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概要
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The idealized bipolaron model proposed by Alexandrov and Ranninger isstudied within the molecular field and the random phase approximations. It isshown that the incommensurate charge density wave (CDW) appears in thepresence of the second neighbor interaction. Its period is determined both bythe ratio of the interaction constants and by the number of bipolarons. The phasediagrams are shown to consist of four phases, i.e., the normal, the superconductive,the normal CDW and the condensed CDW (CCDW) where the ODLRO coexistswith the DLRO. The lowest excitation mode is shown to have the phonon-likespectrum in both the superconductive and the CCDW phases. The CCDWphase, therefore, is expected to be superconductive contrary to the results byAlexandrov and Ranninger.
- 社団法人日本物理学会の論文
- 1983-06-15
著者
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Kubo Kenn
Institute Of Physics University Of Tsukuba
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Kubo Kenn
Institute Of Physics The University Of Tsukuba:max Planck Institut Fur Physik Und Astrophysik
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Takada Satoshi
Institute Of Physics University Of Tsukuba
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Kubo Ken
Institute Of Physics University Of Tukuba
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Takada Satoshi
Institute For Solid States Physics University Of Tokyo : Department Of Physics College Of General Education University Of Tokyo
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