Spin-phonon renormalization of the excitation energy in a diluted two-dimensional ferromagnet

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	Spin-phonon renormalization of the excitation energy in a diluted two-dimensional ferromagnet
	G. Xiong; X. B. Wang; Z. H. Zhang; D. C. Tian
	1999
发表期刊	Communications in Theoretical Physics
ISSN	0253-6102
卷号	32 期号:3 页码:345-350
摘要	The contribution of spin-lattice coupling to the phonon self-energy is calculated for a diluted two-dimensional "soft" ferromagnet. The calculations are based on a bond percolation model. Numerical results are presented for the dampings of phonon excitations. At low temperature, the damping rate is much smaller than the frequency of excitations, leading to well-defined phonons. The overall features of the Gamma(q) curves possess similar characteristics: Gamma(q) has two maximum points at qa approximate to 0.5 and qa approximate to 1.7, the value of the latter is much larger than the former. The temperature-dependent phonon line widths arising from spin-lattice coupling are also presented. We point out the sensitivity of the interaction on bond concentration of the network.
部门归属	wuhan univ, dept phys, wuhan 430072, peoples r china. int ctr mat phys, shenyang 110015, peoples r china. tsing hua univ, adv res ctr, beijing 100084, peoples r china.;xiong, g (reprint author), wuhan univ, dept phys, wuhan 430072, peoples r china
关键词	Diluted Two-dimensional Ferromagnet Phonon Self-energy Magnetic Excitations Medium Approximation Fractal Networks Low-temperatures Normal-state Tc Superconductors Resistivity Scattering Electrons
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WOS记录号	WOS:000083180200006
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/37540
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	G. Xiong,X. B. Wang,Z. H. Zhang,et al. Spin-phonon renormalization of the excitation energy in a diluted two-dimensional ferromagnet[J]. Communications in Theoretical Physics,1999,32(3):345-350.
APA	G. Xiong,X. B. Wang,Z. H. Zhang,&D. C. Tian.(1999).Spin-phonon renormalization of the excitation energy in a diluted two-dimensional ferromagnet.Communications in Theoretical Physics,32(3),345-350.
MLA	G. Xiong,et al."Spin-phonon renormalization of the excitation energy in a diluted two-dimensional ferromagnet".Communications in Theoretical Physics 32.3(1999):345-350.