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Retardation effect on spin–charge separation in one dimension

✍ Scribed by Wen-Qiang Ning; Hui Zhao; Chang-Qin Wu; Hai-Qing Lin

Publisher
Elsevier Science
Year
2007
Tongue
English
Weight
124 KB
Volume
460-462
Category
Article
ISSN
0921-4534

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✦ Synopsis

The spectral properties of spin-charge separation in one-dimensional electron-phonon interacting systems are investigated through the calculation of one-electron spectral functions of one-dimensional Holstein model away from half-filling. It is found that the retardation effect reduces weights of both spinon and holon collective excitations and increases the incoherent spectral weight at the same time, which makes the spin-charge separation invisible in the spectral function. Some differences between the spectral functions of the model at different filling are also discussed.

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