LOCALIZED EXCITATIONS IN COMPETING BOND-ORDER-WAVE, CHARGE-DENSITY-WAVE, AND SPIN-DENSITY-WAVE SYSTEMS
文献类型：期刊论文
| 作者 | WANG, CL; GU, GL; WANG, WZ; SU, ZB ; YU, L; WANG, CL , CHINA CTR ADV SCI & TECHNOL,WORLD LAB,POB 8730,BEIJING 100080,PEOPLES R CHINA.
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| 刊名 | PHYSICAL REVIEW B
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| 出版日期 | 1993 |
| 卷号 | 48期号:15页码:10788-10803 |
| 关键词 | Bridged Mixed-valence Peierls-hubbard Model N-electrons System Nonlinear Lattice-relaxation Wolffram Red Salt Metal-complexes Transfer Crystals Phase-diagram Free State Halogen |
| ISSN号 | 0163-1829 |
| 英文摘要 | The characteristics of localized excitations in quasi-one-dimensional systems are rather sensitive to the interplay between the electron-phonon (e-ph) and electron-electron (e-e) interactions giving rise to competition and possible coexistence of various symmetry-broken ground states such as the bond-order wave (BOW), the charge-density wave (CDW), and the spin-density wave (SDW). Such effects are observable in halogen-bridged mixed-valence transition-metal complexes and can be elucidated within the Bogoliubov-de Gennes formalism using an extended Peierls-Hubbard model. The coexistence of local BOW, CDW, and SDW distortions is demonstrated in this paper for polarons and self-trapped excitons (STE) in different symmetry-broken ground states. An extensive study of localized excitations over a wide range of the on-site e-ph coupling lambda2 and the Hubbard interaction U leads to the following observations. (a) As lambda2 increases at fixed U, the number of bound states inside the gap changes from two to four for the STE case and from two to three for the polaron case. (b) Upon its further increase, one type of STE with a certain pattern of SDW distortion and charge transfer is transforming into another type of STE with a different pattern. (c) A nonmonotonic dependence of the lattice relaxation energy on lambda2 is predicted within the lattice relaxation approach developed by Su and Yu earlier, and is attributed to a crossover from the weak-coupling to strong-coupling behavior showing up as the emergence of new bound states inside the gap. Moreover, the nonradiative transition rate of STE is also calculated and is used to tentatively interpret the very short lifetime of STE in PtCl complexes. Such nonmonotonic dependence of the relaxation rate on the coupling constant may also be observed in other quasi-one-dimensional systems as well. |
| 学科主题 | Physics |
| URL标识 | 查看原文 |
| WOS记录号 | WOS:A1993MD74500015 |
| 公开日期 | 2012-08-29 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/11995]  |
| 专题 | 理论物理研究所_理论物理所1978-2010年知识产出 |
| 通讯作者 | WANG, CL , CHINA CTR ADV SCI & TECHNOL,WORLD LAB,POB 8730,BEIJING 100080,PEOPLES R CHINA. |
| 推荐引用方式 GB/T 7714 | WANG, CL,GU, GL,WANG, WZ,et al. LOCALIZED EXCITATIONS IN COMPETING BOND-ORDER-WAVE, CHARGE-DENSITY-WAVE, AND SPIN-DENSITY-WAVE SYSTEMS[J]. PHYSICAL REVIEW B,1993,48(15):10788-10803. |
| APA | WANG, CL,GU, GL,WANG, WZ,SU, ZB,YU, L,&WANG, CL , CHINA CTR ADV SCI & TECHNOL,WORLD LAB,POB 8730,BEIJING 100080,PEOPLES R CHINA..(1993).LOCALIZED EXCITATIONS IN COMPETING BOND-ORDER-WAVE, CHARGE-DENSITY-WAVE, AND SPIN-DENSITY-WAVE SYSTEMS.PHYSICAL REVIEW B,48(15),10788-10803. |
| MLA | WANG, CL,et al."LOCALIZED EXCITATIONS IN COMPETING BOND-ORDER-WAVE, CHARGE-DENSITY-WAVE, AND SPIN-DENSITY-WAVE SYSTEMS".PHYSICAL REVIEW B 48.15(1993):10788-10803. |
入库方式： OAI收割
来源：理论物理研究所
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