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 PoznaƄ, 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