Phase diagram of the t-U- J1 - J2 chain at half filling

X. Huang, E. Szirmai, F. Gebhard, J. Sólyom, R. M. Noack

Research output: Contribution to journalArticle

11 Citations (Scopus)


We investigate the Hubbard chain at half band filling with additional nearest-neighbor and next-nearest-neighbor spin exchange J1 and J2 using bosonization and the density-matrix renormalization group. For J2 =0 we find a spin-density-wave phase for all positive values of the Hubbard interaction U and the Heisenberg exchange J1. A frustrating spin exchange J2 induces a bond-order-wave phase. For some values of J1, J2, and U, we observe a spin-gapped metallic Luther-Emery phase.

Original languageEnglish
Article number085128
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number8
Publication statusPublished - Aug 25 2008

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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