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】
Free