| 一维反铁磁分子晶体NENP中的孤立子激发 |
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| 引用本文： | 许长谭,庞小峰.一维反铁磁分子晶体NENP中的孤立子激发[J].原子与分子物理学报,1996,13(4):508-514. |
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| 作者姓名： | 许长谭 庞小峰 |
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| 作者单位： | 山东省临沂教育学院物理系(许长谭)，西南民族学院物理系(庞小峰) |
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| 摘 要： | 考虑到磁－声子耦合作用和磁子间的相互作用对非线性集体激发的贡献，我们采用Ｄｙｓｏｎ－Ｍａｌｅｅｖ变换和相干态表示，从一维反铁磁分子晶体ＮＥＮＰ的哈密顿得到了一个非线性Ｋｌｅｉｎ－Ｇｏｒｄｏｎ方程，研究了它的孤立子激发的性质，并求出了孤立子的能量。通过分析发现，只有在具有很强的各向异性反铁磁体中，才有可能观察到孤立子的激发。
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| 关 键 词： | 反铁磁分子晶体NENP 相干态表示 Dyson－Maleev变换 NLKGE孤立子激发 |
SOLITARY EXCITATION IN 1 D ANTIFERROMAGNETIC MOLECULAR CRYSTAL NENP |
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| Xu Changtan,Pang Xiaofneg.SOLITARY EXCITATION IN 1 D ANTIFERROMAGNETIC MOLECULAR CRYSTAL NENP[J].Journal of Atomic and Molecular Physics,1996,13(4):508-514. |
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| Authors: | Xu Changtan Pang Xiaofneg |
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| Institution: | Xu Changtan Pang Xiaofneg Department of physics,Shandong Liyi Education College Shandong Liyi 276001 Department of physics,Southwest Institute of Nationatities Chengdu 610041 |
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| Abstract: | We study the properties of nonlinear collective excitation resnlting from magnon phonon Coupling and magnon magnon interactions in one dimensional antiferromagnetic molecular crystal NENP. A nonlinear Klein Gordon equation, dynamic equation of the system, is obtained from Hamiltonian of this crystal by employing the Dyson Maleev transformation and coherent state representation. We give the properties of the solitary excitation and the soliton energy. These results show that solitary excitation is possible in this system under the condition of the strong anisotropy. |
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| Keywords: | AFM molecular crystal NENP Dyson Maleev transformation Coherent state representation NLKGE Solitary excitation |
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