Angle-resolved photoemission study of the ladder compound Sr14Cu24O41

被引：34
|
作者：
Takahashi, T
Yokoya, T
Ashihara, A
Akaki, O
Fujisawa, H
Chainani, A
Uehara, M
Nagata, T
Akimitsu, J
Tsunetsugu, H
机构：
[1] AOYAMA GAKUIN UNIV, DEPT PHYS, SETAGAYA KU, TOKYO 157, JAPAN
[2] UNIV TSUKUBA, INST APPL PHYS, TSUKUBA, IBARAKI 305, JAPAN
来源：
PHYSICAL REVIEW B | 1997年 / 56卷 / 13期
关键词：
D O I：
10.1103/PhysRevB.56.7870
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Angle-resolved photoemission measurements have been performed on Sr14Cu24O41 which consists of two-leg Cu2O3 ladders and edge-sharing CuO2 chains. The data are consistent with the existence of a dispersive band near the Fermi level which has the periodicity of the ladder sublattice. The band shows a minimum binding energy at ka = (2n + 1)pi/2, suggesting that a Mott-Hubbard gap opens on the ladder. The experimental result shows a qualitative agreement with the t-J ladder calculation. It was also found that replacement of Sr with Ca causes a transfer of holes from the chain to the ladder.
引用
收藏
页码：7870 / 7873
页数：4
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