Charge Transfer Instability with Structural Change.III.Effect of Fluctuation in One-Dimensional N-Sites N-Electrons System
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概要
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The phase diagram for one-dimensional many-electron system with the elec-iron-electron and electron-phonon interactions is studied within the RPA and inthe adiabatic limit, so as to clarify the effect of the fluctuation on the phasediagram given by the mean field theory (MFT). The ground-state energy gain dueto the virtual excitation of the bound and unbound electron-hole pairs is cat-culated. The newly obtained phase diagram is such that the SDW region erodesthe CDW region given by the MFT. In the CDW, the lowest allowed excitation isa pair of charge transfer type excitons with the energy nearly equal to the gap,while in the SDW it is a pair of magnons just above the ground state. This dif-ference results in the erosion, indicating that the comprehensive study of allexci.ted states is essential in obtaining the ground state itself.
- 社団法人日本物理学会の論文
- 1982-10-15
著者
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Toyozawa Yutaka
The Institute For Solid State Physics The University Of Tokyo
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Nasu Keiichiro
The Institute For Solide State Physics The University Of Tokyo
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Toyozawa Yutaka
The Institute For Solide State Physics The University Of Tokyo
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