Spin-charge separation in the 1D Hubbard model with longer-range hopping

C Castleton, Martin Long

Research output: Contribution to journalArticle

1 Citation (Scopus)


Although it is very hard to solve the 2D Hubbard model in the U --> infinity limit, progress can be made using a class of 1D models in which additional longer range-hopping is included. Here, an unusual form of mean field theory is used to study the charge motion in the simplest model of the class - that with nearest and next next nearest neighbour hopping. The solutions found are all spin-charge separated, and for lower electron densities, indications of hard core boson like behaviour for the charge degrees of freedom are seen. For higher electron densities Nagaoka ferromagnetism is seen.
Original languageEnglish
Pages (from-to)2209-2210
Number of pages2
JournalPhysica C Superconductivity
Publication statusPublished - 1 Dec 1994


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