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題名: | Low-Energy Effective Theory for Spin Dynamics of Fluctuating Stripes |
作者: | Cheng, Chi-Ho |
貢獻者: | 物理學系 |
日期: | 2005
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上傳時間: | 2013-05-28T07:11:53Z
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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 |
顯示於類別: | [物理學系] 期刊論文
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