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Triplet superconductivity in a 1D itinerant electron system with transverse spin anisotropy

  • C. Dziurzik
  • G. I. Japaridze
  • A. SchadschneiderEmail author
  • I. Titvinidze
  • J. Zittartz
Solid and Condensed State Physics

Abstract.

In this paper we study the ground state phase diagram of a one-dimensional t-J-U model away from half-filling. In the large-bandwidth limit and for ferromagnetic exchange with easy-plane anisotropy a phase with gapless charge and massive spin excitations, characterized by the coexistence of triplet superconducting and spin density wave instabilities is realized in the ground state. With increasing ferromagnetic exchange transitions into a ferrometallic and then a spin gapped triplet superconducting phase take place.

PACS.

71.10.Hf Non-Fermi-liquid ground states, electron phase diagrams and phase transitions in model systems 71.10.Fd Lattice fermion models (Hubbard model, etc.) 74.20.Mn Unconventional mechanisms (spin fluctuations, polarons and bipolarons, resonating valence bond model, anyon mechanism, marginal Fermi liquid, Luttinger liquid, etc.) 71.27.+a Strongly correlated electron systems; heavy fermions  

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Copyright information

© EDP Sciences/Società Italiana di Fisica/Springer-Verlag 2006

Authors and Affiliations

  • C. Dziurzik
    • 1
  • G. I. Japaridze
    • 2
  • A. Schadschneider
    • 1
    Email author
  • I. Titvinidze
    • 3
    • 1
  • J. Zittartz
    • 1
  1. 1.Institut für Theoretische Physik, Universität zu KölnKölnGermany
  2. 2.Max-Planck-Institut für Physik komplexer SystemeDresdenGermany
  3. 3.Institut für Theorie der Kondensierten Materie Universität KarlsruheKarlsruheGermany

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