Angle-resolved photoemission study of Sr2CuO3

被引：59

作者：

Fujisawa, H ^{[1
]}

Yokoya, T

Takahashi, T

Miyasaka, S

Kibune, M

Takagi, H

机构：

[1] Tohoku Univ, Dept Phys, Sendai, Miyagi 9808578, Japan

[2] Univ Tokyo, Inst Solid State Phys, Minato Ku, Tokyo 1068666, Japan

来源：

PHYSICAL REVIEW B | 1999年 / 59卷 / 11期

关键词：

D O I：

10.1103/PhysRevB.59.7358

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report angle-resolved photoemission spectroscopy (ARPES) on a single Cu-O chain compound Sr2CuO3 with Ne I photons. In contrast with previous ARPES with higher-energy photons, the present result clearly shows two well-separated branches of dispersions near E-F ascribable to spinon and holon excitations, respectively. This indicates that spin and charge degrees of freedom are separated in one-dimensional Cu-O chains, supporting the theoretical prediction as well as the previous ARPES interpretation. Comparison with previous ARPES results indicates that surface, photoionization cross section, and finite-temperature effects substantially modify ARPES spectra. [S0163-1829(99)04508-7].

引用

页码：7358 / 7361

页数：4

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