期刊论文详细信息
Low-energy effective theory for spin dynamics of fluctuating stripes
Article
关键词: T-J MODEL;    MEAN-FIELD THEORY;    PHASE-SEPARATION;    MAGNETIC DYNAMICS;    SUPERCONDUCTIVITY;    ANTIFERROMAGNET;    LA2CUO4;    HOLES;   
DOI  :  10.1103/PhysRevB.72.184516
来源: SCIE
【 摘 要 】

We derive an effective Hamiltonian for spin dynamics of fluctuating smectic stripes from the t-J model in the weak coupling limit t > J. Besides the modulation of spin magnitude, the high energy hopping term would induce a low-energy antiferromagnetic interaction between two neighboring blocks of spins. Based on the effective Hamiltonian, we applied the linear spin-wave theory and found that the spin-wave velocity is almost isotropic for La2-xSrxCuO4 unless the structural effect is considered. The intensity of the second harmonic mode is found to be about 10% to that of the fundamental mode.

【 授权许可】

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