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Please use this identifier to cite or link to this item:
http://ir.ncue.edu.tw/ir/handle/987654321/16576
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| Title: | Low-Energy Effective Theory for Spin Dynamics of Fluctuating Stripes |
| Authors: | Cheng, Chi-Ho |
| Contributors: | 物理學系 |
| Date: | 2005
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| Issue Date: | 2013-05-28T07:11:53Z
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| 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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| 2020202010001.pdf | 75Kb | Adobe PDF | 421 | View/Open |
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