An Extended Supersymmetric t-J Model |

Yao-Zhong ZhangYukawa Institute of Theoretical Physics, Kyoto University, Kyoto, Japan |

Received: April 5, 1995 |

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A new lattice model is presented for correlated electrons on the unrestricted 4^{L}-dimensional electronic Hilbert space ⨁^{L}_{n=1}C^{4} (where L is the lattice length). It is an extension of the supersymmetric t-J model. The new model has gl(2|1) supersymmetry and contains one symmetry-preserving free real parameter α which has its origin in the one-parameter family of inequivalent typical 4-dimensional irreps of gl(2|1). When α = 0, the model reduces to the supersymmetric t-J model. |

DOI: 10.12693/APhysPolA.88.1119 PACS numbers: 71.20.Ad, 75.10.Jm |