Angle-resolved photoemission spectroscopy of the antiferromagnetic superconductor Nd1.87Ce0.13CuO4:: Anisotropic spin-correlation gap, pseudogap, and the induced quasiparticle mass enhancement -: art. no. 047005

被引：119

作者：

Matsui, H ^{[1
]}

Terashima, K

Sato, T

Takahashi, T

Wang, SC

Yang, HB

Ding, H

Uefuji, T

Yamada, K

机构：

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

[2] Boston Coll, Dept Phys, Chestnut Hill, MA 02467 USA

[3] Kyoto Univ, Inst Chem Res, Kyoto 6110011, Japan

[4] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan

来源：

PHYSICAL REVIEW LETTERS | 2005年 / 94卷 / 04期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevLett.94.047005

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We performed high-resolution angle-resolved photoemission spectroscopy on Nd1.87Ce0.13CuO4, which is located at the boundary of the antiferromagnetic (AF) and the superconducting phase. We observed that the quasiparticle (QP) effective mass around (pi,0) is strongly enhanced due to the opening of the AF gap. The QP mass and the AF gap are found to be anisotropic, with the largest value near the intersecting point of the Fermi surface and the AF zone boundary. In addition, we observed that the QP peak disappears around the Neel temperature (T-N) while the AF pseudogap is gradually filled up at much higher temperatures, possibly due to the short-range AF correlation.

引用

页数：4