Electron-phonon coupling and spin-charge separation in one-dimensional Mott insulators

被引：25
|
作者：
Matsueda, H. [1 ]
Tohyama, T.
Maekawa, S.
机构：
[1] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan
[2] Japan Sci & Technol Agcy, JST, CREST, Kawaguchi 3320012, Japan
来源：
PHYSICAL REVIEW B | 2006年 / 74卷 / 24期
关键词：
D O I：
10.1103/PhysRevB.74.241103
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We examine the single-particle excitation spectrum in the one-dimensional Hubbard-Holstein model at half-filling by performing a dynamical density matrix renormalization group calculation. The spin-charge separation is robust against the electron-phonon (EP) coupling, although both spinon and holon branches are affected by phonons. We find that this robustness is in sharp contrast to a rather strong influence of the EP coupling on quasiparticle properties in two dimensions. We discuss the implication of the results of recent angle-resolved photoemission spectroscopy measurements on SrCuO2.
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页数：4
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