The properties of quantum fluctuations in strongly coupled electron-phonon systems with correlated displacement and squeezing
文献类型：期刊论文
| 作者 | X. F. Pang |
| 刊名 | Journal of Physics and Chemistry of Solids
 |
| 出版日期 | 2001 |
| 卷号 | 62期号:3页码:491-501 |
| 关键词 | molecular-crystal model ground-state bipolaronic superconductivity phase-diagram |
| ISSN号 | 0022-3697 |
| 中文摘要 | Influences of the non-adiabatic phonon fluctuations on the ground state, and on the minimum uncertainty principle of phonons were investigated by introducing a new state-ansatz including correlation between the displacement and squeezing of the phonons in the strongly coupled electron-phonon systems. For a large squeezing, the correlation lowers, obviously, the energy of the ground state, and increases the binding energy of the polaron when compared with the uncorrelated case. Thus the stabilization of the polarons and the stability of the systems are all enhanced. The correlation was also found to suppress the quantum reduction of the classical narrowing of the polaron band, and to weaken the tunnelling effect of the polarons, and to enhance the quantum uncertainty for the phonon coordinate due to the coupling with the electron density fluctuation. Generally, the correlated effects and new ansatz introduced here were found to be relevant for a sufficiently large squeezing in the strongly and intermediately coupled electron-phonon systems. (C) 2001 Elsevier Science Ltd. All rights reserved. |
| 原文出处 | |
| 公开日期 | 2012-04-14 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/36769]  |
| 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. F. Pang. The properties of quantum fluctuations in strongly coupled electron-phonon systems with correlated displacement and squeezing[J]. Journal of Physics and Chemistry of Solids,2001,62(3):491-501. |
| APA | X. F. Pang.(2001).The properties of quantum fluctuations in strongly coupled electron-phonon systems with correlated displacement and squeezing.Journal of Physics and Chemistry of Solids,62(3),491-501. |
| MLA | X. F. Pang."The properties of quantum fluctuations in strongly coupled electron-phonon systems with correlated displacement and squeezing".Journal of Physics and Chemistry of Solids 62.3(2001):491-501. |
入库方式： OAI收割
来源：金属研究所
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