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Please use this identifier to cite or link to this item: http://ir.ncue.edu.tw/ir/handle/987654321/16576

Title: Low-Energy Effective Theory for Spin Dynamics of Fluctuating Stripes
Authors: Cheng, Chi-Ho
Contributors: 物理學系
Date: 2005
Issue Date: 2013-05-28T07:11:53Z
Publisher: The American Physical Society
Abstract: 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.
Relation: Physical Review B, 72(18): 184516
Appears in Collections:[物理學系] 期刊論文

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