Changes in the physical properties of nonadiabatically coupled electron-phonon systems arising from squeezing-antisqueezing effect

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	Changes in the physical properties of nonadiabatically coupled electron-phonon systems arising from squeezing-antisqueezing effect
	X. F. Pang
	2003
发表期刊	International Journal of Modern Physics B
ISSN	0217-9792
卷号	17 期号:31-32 页码:6031-6056
摘要	Changes in the physical properties such as the ground state properties, charge density wave ordering, binding energy and energy bandwidth of polaron and quantum fluctuation, and minimum uncertainty relation of phonons and nonadiabatically coupled electron-phonon systems with spin-1/2 have been investigated by our new state ansatz which can account for correlation among the phononic displacement, squeezing and polaron effects using variational method in one-dimensional Holstein model. The investigation here shows that the squeezing-antisqueezing effect (correlated) results in a decrease of the ground state energy, an increase of the binding energy of polarons, the reduction of the uncertainty and quantum fluctuation of the phonons, a decrease of polaron narrowing of electron bandwidth, an increase of tunneling effect of the polarons and an increase of CDW ordering and phonon staggered ordering when compared with the uncorrelated case. Therefore, this shows that the ground state determined by the new state ansatz is the most stable. The new ansatz which include the squeezing-antisqueezing (correlated) effect is very relevant for the coupled electron-phonon systems, especially in strongly coupled and highly squeezed cases.
部门归属	univ elect sci & technol china, inst life sci & technol, chengdu 610054, peoples r china. chinese acad sci, int ctr mat phys, shenyang 110015, peoples r china. ccast, world lab, beijing 100080, peoples r china.;pang, xf (reprint author), univ elect sci & technol china, inst life sci & technol, chengdu 610054, peoples r china
关键词	Molecular-crystal Model Ground-state Correlated Displacement Quantum Fluctuations Phase-diagram Radiation-field Polaron Coherent Light
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WOS记录号	WOS:000189090200019
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/35989
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	X. F. Pang. Changes in the physical properties of nonadiabatically coupled electron-phonon systems arising from squeezing-antisqueezing effect[J]. International Journal of Modern Physics B,2003,17(31-32):6031-6056.
APA	X. F. Pang.(2003).Changes in the physical properties of nonadiabatically coupled electron-phonon systems arising from squeezing-antisqueezing effect.International Journal of Modern Physics B,17(31-32),6031-6056.
MLA	X. F. Pang."Changes in the physical properties of nonadiabatically coupled electron-phonon systems arising from squeezing-antisqueezing effect".International Journal of Modern Physics B 17.31-32(2003):6031-6056.