Dopedt−Jmodel on a triangular lattice: Possible application toNaxCoO2⋅yH2OandNa1−xTiO2

2003/04/30 by Qiang-Hua Wang, Dung-Hai Lee, Dung‐Hai Lee +1
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Magnetic and transport properties of perovskites and related materials #Physics of Superconductivity and Magnetism #cond-mat.str-el #cond-mat.supr-con

paper · pdf · doi:10.1103/physrevb.69.092504

published as Phys. Rev. B 69, 092504 (2004). · 3 figures, text polished, to appear in Phys. Rev. B

arxiv created 2003/12/23 · openalex publication_date 2004/03/12 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

We report the finding of time-reversal-symmetry-breaking d_x²\ensuremath-y²+id_xy superconducting ground state in the slave-boson mean-field theory for the t\ensuremath-J model on triangular lattice. For t/J=\ensuremath-5(t/J=\ensuremath-9) pairing exists for x<13% (x<8%) upon electron doping, and x<56% (x<13%) upon hole doping. These results are potentially relevant to doped Mott insulators Na_xCoO₂\ensuremath⋅yH₂O and Na_1\ensuremath-xTiO₂.

Citations

• Possible highT c superconductivity in the Ba?La?Cu?O system
• Electronic Model forCoO2Layer Based Systems: Chiral Resonating Valence Bond Metal and Superconductivity
• Renormalized mean-field theory of neutron scattering in cuprate superconductors
• Superconductivity inCoO2layers and the resonating valence bond mean-field theory of the triangular latticet−Jmodel
• Equivalence of the resonating-valence-bond and fractional quantum Hall states
• Unusual Superconducting State of Underdoped Cuprates