Charge order, metallic behavior, and superconductivity in La2-xBaxCuO4 with x=1/8

被引：45

作者：

Homes, CC ^{[1
]}

Dordevic, SV ^{[1
]}

Gu, GD ^{[1
]}

Li, Q ^{[1
]}

Valla, T ^{[1
]}

Tranquada, JM ^{[1
]}

机构：

[1] Brookhaven Natl Lab, Condensed Matter Phys & Mat Sci Dept, Upton, NY 11973 USA

来源：

PHYSICAL REVIEW LETTERS | 2006年 / 96卷 / 25期

关键词：

D O I：

10.1103/PhysRevLett.96.257002

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The ab-plane optical properties of a cleaved single crystal of La2-xBaxCuO4 for x=1/8 (T-c similar or equal to 2.4 K) have been measured over a wide frequency and temperature range. The low-frequency conductivity is Drude-like and shows a metallic response with decreasing temperature. However, below similar or equal to 60 K, corresponding to the onset of charge-stripe order, there is a rapid loss of spectral weight below about 40 meV. The behavior is quite different from that typically associated with the pseudogap in the normal state of the cuprates. Instead, the gapping of the normal-state single-particle excitations looks surprisingly similar to that observed in superconducting La2-xSrxCuO4, including the presence of a residual Drude peak with reduced weight.

引用

页数：4

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