Superconducting gap anisotropy in Nd1.85Ce0.15CuO4:: Results from photoemission

被引：159

作者：

Armitage, NP ^{[1
]}

Lu, DH

Feng, DL

Kim, C

Damascelli, A

Shen, KM

Ronning, F

Shen, ZX

Onose, Y

Taguchi, Y

Tokura, Y

机构：

[1] Stanford Univ, Dept Phys, Stanford, CA 94305 USA

[2] Stanford Univ, Stanford Synchrotron Radiat Lab, Stanford, CA 94305 USA

[3] Univ Tokyo, Dept Appl Phys, Tokyo 1138656, Japan

来源：

PHYSICAL REVIEW LETTERS | 2001年 / 86卷 / 06期

关键词：

D O I：

10.1103/PhysRevLett.86.1126

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have performed angle resolved photoelectron spectroscopy on the electron doped cuprate superconductor Nd1.85Ce0.15CuO4 A comparison of the leading edge midpoints between the superconducting and normal states reveals a small, but finite shift of 1.5-2 meV near the (pi ,0) position, but no observable shift along the zone diagonal near (pi /2,pi /2). This is interpreted as evidence For an anisotropic superconducting gap in the electron doped materials, which is consistent with the presence of d-wave superconducting order in this cuprate superconductor.

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页码：1126 / 1129

页数：4

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