Volume 87, Number 3, August 2009
|Number of page(s)||6|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||28 August 2009|
Possible superconducting symmetry on the doped J1-J2 model investigated using the renormalized mean-field theory
Department of Physics, Shanghai University - Shanghai, 200444, China
Corresponding author: email@example.com
Accepted: 27 July 2009
By making use of the renormalized mean-field theory, we investigate possible superconducting symmetry in the ground states of the t1-t2-J1-J2 model on a square lattice. The superconducting symmetry of ground states is determined by the frustration amplitude and doping concentration. The phase diagram of this system in the frustration-doping plane is given. The amplitude of the pairing parameter on diagonal bonds increases with increasing value of , and ground-state change from a conventional -wave state to a mixed state, ultimately to a dxy-wave state. The order of the phase transitions among these different symmetry states is discussed.
PACS: 74.20.Rp – Pairing symmetries (other than s-wave) / 74.25.Dw – Superconductivity phase diagrams / 74.20.Mn – Nonconventional mechanisms (spin fluctuations, polarons and bipolarons, resonating valence bond model, anyon mechanism, marginal Fermi liquid, Luttinger liquid, etc.)
© EPLA, 2009
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