Possible superconducting symmetry on the doped J1-J2 model investigated using the renormalized mean-field theory

Huai-Xiang Huang; Ying Jiang; Guo-Hong Yang

doi:10.1209/0295-5075/87/37009

All issues

Volume 87 / No 3 (August 2009)

EPL, 87 3 (2009) 37009

Abstract

Issue		EPL Volume 87, Number 3, August 2009


Article Number		37009
Number of page(s)		6
Section		Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties
DOI		https://doi.org/10.1209/0295-5075/87/37009
Published online		28 August 2009

EPL, 87 (2009) 37009

Possible superconducting symmetry on the doped J₁-J₂ model investigated using the renormalized mean-field theory

Huai-Xiang Huang, Ying Jiang and Guo-Hong Yang

Department of Physics, Shanghai University - Shanghai, 200444, China

Corresponding author: hxhuang@shu.edu.cn

Received: 15 January 2009
Accepted: 27 July 2009

Abstract

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 $t_{2}/t_{1}$ 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 $t_{2}/t_{1}$ , and ground-state change from a conventional $d_{x^{2}-y^{2}}$ -wave state to a mixed state, ultimately to a d_xy-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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