Spin-charge separation in single-chain compound Sr2CuO3 studied by angle-resolved photoemission

被引：34

作者：

Fujisawa, H ^{[1
]}

Yokoya, T

Takahashi, T

Miyasaka, S

Kibune, M

Takagi, H

机构：

[1] Tohoku Univ, Dept Phys, Sendai, Miyagi 98077, Japan

[2] Univ Tokyo, Inst Solid State Phys, Minato Ku, Tokyo 106, Japan

来源：

SOLID STATE COMMUNICATIONS | 1998年 / 106卷 / 08期

关键词：

insulators; electronic band structure; photoelectron spectroscopies;

D O I：

10.1016/S0038-1098(98)00099-4

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Angle-resolved photoemission measurements were performed for one-dimensional Sr2CuO3 which consists of single Cu-O chains. Two dispersive bands were observed near E-F in the first half of the Brillouin zone (k = 0 to pi/2) of the chain-direction. Both bands have a common maximum point closest to E-F at k = pi/2 while they show different dispersions of about 0.25 and 1 eV, respectively, with a continuous intensity distribution in between. The less dispersive band is almost diminished in another half of the Brillouin zone (k = pi/2 to pi). These results are consistent with the solution of the one-dimensional Hubbard model as well as the t-J model calculation, suggesting the spin-charge separation in the one-dimensional Cu-O chain. The experimental results are compared with those of the double-chain compound SrCuO2. (C) 1998 Published by Elsevier Science Ltd.

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页码：543 / 547

页数：5

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