Spectral function of a quarter-filled one-dimensional charge density wave insulator

被引：21

作者：

Essler, FHL ^{[1
]}

Tsvelik, AM

机构：

[1] Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England

[2] Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA

来源：

PHYSICAL REVIEW LETTERS | 2002年 / 88卷 / 09期

关键词：

D O I：

10.1103/PhysRevLett.88.096403

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We consider a one-dimensional charge density wave insulator formed by umklapp processes in a quarter-filled band. The spectrum of the model consists of gapless, uncharged excitations carrying spin +/-1/2 (spinons) and gapped, spinless excitations carrying charge +/-e/2 (solitons and antisolitons). We calculate the low-energy behavior of the single-electron Green's function at zero temperature. The spectral function exhibits a featureless scattering continuum of two solitons and many spinons. The theory predicts that the gap observed by angle resolved photoemission is twice the activation gap in the dc conductivity. We comment on possible applications to PrBa2Cu3O7 and to the Bechgaard salts.

引用

页码：964031 / 964034

页数：4

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