Spin Gap of the One- Dimensional t-J-J' Model
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概要
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We investigate the one-dimensional t-J-J' model by the numerical diagonalization where a few holes are doped in the half-filled band. By introducing a finite-size scaling, we estimate the spin gap at J'/J=0.5 and J/t=2. When one hole is doped, the spin gap decreases to 0.190J in comparison with 0.236J which is the spin gap of the half-filled band. The spin gap further reduces to 0.141J for two-hole doping and to about 0.05J for three-hole doping. This result shows that the value of the spin gap as a function of the electron density is discontinuous at half-filling.
- 社団法人日本物理学会の論文
- 1993-11-15
著者
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Sano Kazuhiro
Department Of Physics Engineering Mie University
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Sano Kazuhiro
Department Of Physics Faculty Of Education Mie University
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Takano Ken'ichi
Toyota Technological Institute
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Takano Ken′ichi
Toyota Technological Institute
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