Protected nodes and the collapse of Fermi arcs in High-Tc cuprate superconductors

被引：126

作者：

Kanigel, A. ^{[1
]}

Chatterjee, U.

Randeria, M.

Norman, M. R.

Souma, S.

Shi, M.

Li, Z. Z.

Raffy, H.

Campuzano, J. C.

机构：

[1] Univ Illinois, Dept Phys, Chicago, IL 60607 USA

[2] Ohio State Univ, Dept Phys, Columbus, OH 43210 USA

[3] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA

[4] Paul Scherrer Inst, Swiss Light Source, CH-5232 Villigen, Switzerland

[5] Univ Paris 11, Phys Solides Lab, F-91405 Orsay, France

来源：

PHYSICAL REVIEW LETTERS | 2007年 / 99卷 / 15期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevLett.99.157001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Angle resolved photoemission on underdoped Bi2Sr2CaCu2O8 reveals that the magnitude and d-wave anisotropy of the superconducting state energy gap are independent of temperature all the way up to T-c. This lack of T variation of the entire k-dependent gap is in marked contrast to mean field theory. At T-c the point nodes of the d-wave gap abruptly expand into finite length "Fermi arcs." This change occurs within the width of the resistive transition, and thus the Fermi arcs are not simply thermally broadened nodes but rather a unique signature of the pseudogap phase.

引用

页数：4

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