Superconductivity of the One-Dimensional d-p Model with p-p Transfer. II.
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概要
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We investigate the one-dimensional d-p rnodel with the transfer energy t.. between the nearestneighbor p sites by the numerical diagonalization raaethod. By calculating the critic;xl exponentK. based on the Ltuttinger liquid reJ?ttions ;'tnd the paring correlation f'tunctions, we analyze thesupercondtrcting state induced by the ef['ect of the large reptrlsion U.) at the Ctu site in cooperationwith the transf'er energy t... We obtain a phase diagram of the strpercondtrcting region on thefilling n vs. Uct parazneter plane. It shows that tire strpercondtrcting region appears when U.zis larger than a certain critical valtre xvlaich decreases with lucre;rsing n. The results of paringcorrelation functions svxggest that a singlet paring between the rxearest neighlcor p sites is mostrelevant to the superconductivity. We also discuss a relationship between the d-p rnodel and thet-J model through an analysis of' the dependence of K. 011 the pararneters,
- 社団法人日本物理学会の論文
- 1998-12-15
著者
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ONO Yoshiaki
Department of Physics,Nagoya University
-
Ono Yoshiaki
Department Of Geriatric Dentistry Osaka Dental University
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Sano Kazuhiro
Department of Physics, Faculty of Education, Mie University
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Sano Kazuhiro
Department Of Physics Engineering Mie University
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