National Changhua University of Education Institutional Repository : Item 987654321/16576
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题名: Low-Energy Effective Theory for Spin Dynamics of Fluctuating Stripes
作者: Cheng, Chi-Ho
贡献者: 物理學系
日期: 2005
上传时间: 2013-05-28T07:11:53Z
出版者: The American Physical Society
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.
關聯: Physical Review B, 72(18): 184516
显示于类别:[物理學系] 期刊論文

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