SPIN-PHONON RENORMALIZATION OF THE EXCITATION-ENERGY IN A DILUTE 2-DIMENSIONAL ANTIFERROMAGNET
文献类型：期刊论文
| 作者 | X. B. Wang ; J. X. Li ; Q. Jiang ; Z. H. Zhang ; D. C. Tian |
| 刊名 | Physical Review B
 |
| 出版日期 | 1994 |
| 卷号 | 50期号:10页码:7056-7064 |
| 关键词 | high-tc superconductors low-temperatures normal-state heisenberg-antiferromagnet thermal-conductivity medium approximation amorphous materials gap fluctuations resistivity |
| ISSN号 | 0163-1829 |
| 中文摘要 | The contribution of spin-lattice coupling to the phonon self-energy is calculated in a dilute two-dimensional antiferromagnet. The calculations are based on a bond percolation model of the CuO2 plane of high-T(c) copper oxides recently proposed by some of the authors. Numerical results are presented for the dampings of phonon excitations relating to three different situations. They are two magnons (Case A), one magnon and one fracton (Case B), and two fractons (Case C) involved in the phonon self-energy process. At low temperatures, the damping rate is much smaller than the frequency of excitations, leading to well-defined phonons for all the cases. The overall features of the GAMMA(q) approximately q curves possess similar characteristics: GAMMA(q) increases linearly with q in the small-q region, reaching a maximum at an intermediate q, and after that scales nearly as q-2 until q approaches the edge of the Brillouin zone. The temperature-dependent phonon linewidths arising from spin-lattice coupling are also presented. We point out the sensitivity of the interaction involving fractons on bond concentration of the network. Relevance of the calculated results to experimental data are discussed. |
| 原文出处 | |
| 公开日期 | 2012-04-14 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/38941]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 推荐引用方式 GB/T 7714 | X. B. Wang,J. X. Li,Q. Jiang,et al. SPIN-PHONON RENORMALIZATION OF THE EXCITATION-ENERGY IN A DILUTE 2-DIMENSIONAL ANTIFERROMAGNET[J]. Physical Review B,1994,50(10):7056-7064. |
| APA | X. B. Wang,J. X. Li,Q. Jiang,Z. H. Zhang,&D. C. Tian.(1994).SPIN-PHONON RENORMALIZATION OF THE EXCITATION-ENERGY IN A DILUTE 2-DIMENSIONAL ANTIFERROMAGNET.Physical Review B,50(10),7056-7064. |
| MLA | X. B. Wang,et al."SPIN-PHONON RENORMALIZATION OF THE EXCITATION-ENERGY IN A DILUTE 2-DIMENSIONAL ANTIFERROMAGNET".Physical Review B 50.10(1994):7056-7064. |
入库方式： OAI收割
来源：金属研究所
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