摘要A single band t-U-J1-J2 model is proposed as the minimum model to describe the superconductivity of the newly discovered iron-based superconductors R(O1-xFx)FeAs and RO1-xFeAs (R=La, Ce, Sm, Pr, Nd, Gd). With the mean-field approach, it is found that the pairing occurs in the d-wave channel. In the likely parameter region of the real materials, by lowering temperature, the system enters firstly the dxy superconducting phase with D4h-symmetry and then enters the time-reversal-symmetry-broken dxy+idx2-y2 superconducting phase with C4h-symmetry.
Abstract：A single band t-U-J1-J2 model is proposed as the minimum model to describe the superconductivity of the newly discovered iron-based superconductors R(O1-xFx)FeAs and RO1-xFeAs (R=La, Ce, Sm, Pr, Nd, Gd). With the mean-field approach, it is found that the pairing occurs in the d-wave channel. In the likely parameter region of the real materials, by lowering temperature, the system enters firstly the dxy superconducting phase with D4h-symmetry and then enters the time-reversal-symmetry-broken dxy+idx2-y2 superconducting phase with C4h-symmetry.
(Fermi surface: calculations and measurements; effective mass, g factor)
引用本文:
LI Jian;WANG Yu-Peng. The Minimum Model for the Iron-Based Superconductors[J]. 中国物理快报, 2008, 25(6): 2232-2234.
LI Jian, WANG Yu-Peng. The Minimum Model for the Iron-Based Superconductors. Chin. Phys. Lett., 2008, 25(6): 2232-2234.
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2008, Vol. 25 
