Perturbation Calculation of k-Mass for Two-dimenstional Hubbard Model with Long-Range Coulomb Interaction
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概要
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XVe investig?rte the txvo-dirnensional Htrblcard taaodel with the long-range Coulotaab interaction.We 2LSSLlll1(2 the fortaa of' the efl'ective Cotrlotaab interaction, wluich is treated 218 a perttrrbation. Forthe h?a[f-filling case, the self'-energy is ntruaaericatlly evaltrated up to the second-order terzns of theperttrrbation expansion with the ftrll naotaaenttrt?a dependence incltrded, The A-uauass is calctrlatedf'rorm this self-energy. It is found that the first-order tertau tmakes a dotaainant contribution to theredtrction of' the A-uatass.
- 社団法人日本物理学会の論文
- 1998-05-15
著者
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Yamada Kosaku
Department Of Mechanical Engineering Faculty Of Engineering Kagoshima University
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YODA Shuntaro
Department of Physics,Kyoto University
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Yoda Shuntaro
Department Of Physics Kyoto University
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