Effective Mass of Bound and Resonant Two-Electron Pairs in a Simple Cubic Lattice |

M. Bak
Faculty of Physics, A. Mickiewicz University, Umultowska 85, 61-614 PoznaĆ, Poland |

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Effective masses m^{*} of bound 2-electron pairs on a simple cubic lattice were investigated within tUWJ model within symmetry channels. Linear increase of m^{*} with |W| for intersite pairs and nonlinear behavior and sign change of m^{*} in case of pairs with on-site component were found. |m^{*}| turned out to be larger than twice free electron mass. |

DOI: 10.12693/APhysPolA.127.290 PACS numbers: 03.65.Ge, 37.10.Jk |