Kinetic Energy of Holes in the Hubbard Model

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概要

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• This paper compares the kinetic energy of holes in the antiferromagnetic (AF) stateand in an approximate singlet liquid wave function of the Resonating Valence Bondtype (RVB), with only nearest neighbour singlet pairing. The atomic interaction U ofthe Hubbard model is taken to be large compared with the band width St. In the limitSt/ U=0, I find that the hole kinetic energy is at most as low in RVB than in AF, butthere are indications that it is in fact lower in AF. At finite t/ U, the comparison be-tween AF and RVB depends on corrections of order t 7 U which are not known yet forRVB, but which should be of the same order as in AF. As a restult within the simplestHubbard model with nearest neighbour hopping, it is unlikely tltat a small concentra-tion of holes can stabilize RVB if the latter is less stable than AH at half band filling.

• 社団法人日本物理学会の論文
• 1988-05-15

著者

• Lederer P

  Institute For Solid State Physics University Of Tokyo:university Of Tokyo Research Fellow:physique D

• Lederer Pascal

  Institute for Solid State Physics,University of Tokyo:University of Tokyo Research Fellow:Physique des Solides,Bat 510,Universite Paris-Sud

関連論文

• Kinetic Energy of Holes in the Hubbard Model

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