Stability of the spiral phase in the two-dimensional extended t-J model

Article

关键词: QUANTUM ANTIFERROMAGNET;    DOPED ANTIFERROMAGNET;    SPECTRAL-FUNCTION;    MAGNETIC PHASES;    HUBBARD-MODEL;    ORDER;    SUPERCONDUCTORS;    INSTABILITY;    FLUCTUATIONS;    SEPARATION;   

DOI  :  10.1103/PhysRevB.70.195105

来源: SCIE

【 摘 要 】

We analyze the t-t(')-t(')-J model at low doping deltamuch less than1 by chiral perturbation theory and show that the (1,0) spiral state is stabilized by the presence of t('), t(') above critical values around 0.2J, assuming t/J=3.1. We find that the (magnon mediated) hole-hole interactions have an important effect on the region of charge stability in the space of parameters t('), t('), generally increasing stability, while the stability in the magnetic sector is guaranteed by the presence of spin quantum fluctuations (order from disorder effect). These conclusions are based on perturbative analysis performed up to two loops, with very good convergence.

【 授权许可】

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