学术
摘 要:
文章作者结合团簇微扰理论和优化声子基近似的方法，通过单电子谱函数的计算，研究了一维关联系统中声子效应对自旋-电荷分离的影响，发现由于有限声子频率带来的推迟效应抑制自旋-电荷分离，使之在谱函数中不可见，同时还得到电子对和极化子劈裂的信息。[著者文摘]
文章出处:
《物理》-2006年35卷11期 -911-912页
栏目信息:
分 类 号:
Spin-charge separation in one-dimensional electron-phonon systems
ZHAO Hui, NING Wen-Qiang, WU Chang-Qin, LIN Hai-Qing （1 Departmeut of Physics, Fudan University, Shanghai 200433, China; 2 Department of Physics and Institute of Theoretical Physics, The Chinese University of Hong Kong, Shatin, Hong Kong, China）
Abstract:
Phonon effects on spin - charge separation in one dimension are investigated through the calculation of one - electron spectral functions in terms of the recently developed cluster perturbation theory together with an optimized phonon approach. It is found that the retardation effect due to the finiteness of phonon frequency suppresses the spin - charge separation and eventually makes it invisible in the spectral function. Signatures of electron pairing and polaron splitting in the spectral function are also observed.[著者文摘]
Key words:
spin charge separation, electron-phonon interactions, spectral function
基金资助:
国家自然科学基金（批准号：90403110）、CUHK基金（批准号：401504）资助项目
更多>>免费文章
cqvip.com