supported by the State Key Laboratory of Software Development Environment,China(Grant No.SKLSDE-2013ZX-21);the National Natural Science Foundation of China(Grant No.50971011);the Beijing Natural Science Foundation,China(Grant No.1102025)
Ferromagnetism in the one-dimensional Hubbard model with the next-nearest-neighbor hopping is explored by using the exact-diagonalization method in a small cluster and the equation-of-motion method in the thermodynami...