FFLO oscillations and magnetic domains in the Hubbard model with off-diagonal Coulomb repulsion
arXiv:1103.2962 · doi:10.1088/1742-5468/2011/12/P12014
Abstract
We observe the effect of non-zero magnetization m onto the superconducting ground state of the one dimensional repulsive Hubbard model with correlated hopping X. For t/2 < X < 2t/3, the system first manifests Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) oscillations in the pair-pair correlations. For m = m1 a kinetic energy driven macroscopic phase separation into low-density superconducting domains and high-density polarized walls takes place. For m > m2 the domains fully localize, and the system eventually becomes a ferrimagnetic insulator.
IOP RevTeX class, 18 pages, 13 composite *.eps figures
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