d-Wave spin density wave phase in the attractive hubbard model with spin polarization

Hiromasa Tamaki, Kazumasa Miyake, Yoji Ohashi

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

We investigate the possibility of an unconventional spin density wave (SDW) in the attractive Hubbard model with finite spin polarization. We show that pairing and density fluctuations induce a transverse d-wave SDW near the half-filling. This novel SDW is related to the d-wave superfluidity induced by antiferromagnetic spin fluctuations, in the sense that they are connected with each other through Shibas attraction-repulsion transformation. Our results predict the d-wave SDW in real systems, such as cold Fermi atom gases with a population imbalance and compounds involving valence skipper elements.

Original languageEnglish
Article number073001
JournalJournal of the Physical Society of Japan
Volume78
Issue number7
DOIs
Publication statusPublished - 2009 Jul

Keywords

  • Attraction-repulsion transformation
  • Attractive Hubbard model
  • Charge density wave
  • D-wave SDW
  • FLEX approximation
  • Paulis paramagnetic effect
  • Superconductivity
  • Superfluidity

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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