Quasiparticles in the superconducting state of Bi2Sr2CaCu2O8+δ

被引：168

作者：

Kaminski, A ^{[1
]}

Mesot, J

Fretwell, H

Campuzano, JC

Norman, MR

Randeria, M

Ding, H

Sato, T

Takahashi, T

Mochiku, T

Kadowaki, K

Hoechst, H

机构：

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

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

[3] Tata Inst Fundamental Res, Bombay 400005, Maharashtra, India

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

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

[6] Natl Res Inst Met, Tsukuba, Ibaraki 305, Japan

[7] Univ Tsukuba, Inst Mat Sci, Tsukuba, Ibaraki 305, Japan

[8] Univ Wisconsin, Ctr Synchrotron Radiat, Stoughton, WI 53589 USA

来源：

PHYSICAL REVIEW LETTERS | 2000年 / 84卷 / 08期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevLett.84.1788

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Recent improvements in momentum resolution lead to qualitatively new angle-resolved photoemission spectroscopy results on the spectra of Bi2Sr2CaCu2O8+delta (Bi2212) along the (pi, pi) direction, where there is a node in the superconducting gap. We now see the intrinsic line shape, which indicates the presence of true quasiparticles at all Fermi momenta in the superconducting state, and lack thereof in the normal state. The region of momentum space probed here is relevant for charge transport, motivating a comparison of our results to conductivity measurements by infrared reflectivity.

引用

页码：1788 / 1791

页数：4

共 17 条

[1]

Anderson P. W., 1997, THEORY SUPERCONDUCTI

[2]

Campuzano JC, 1998, NATO ADV SCI I B-PHY, V371, P229

[3] PRECISION-MEASUREMENTS OF THE TEMPERATURE-DEPENDENCE OF LAMBDA IN YBA2CU3O6.95 - STRONG EVIDENCE FOR NODES IN THE GAP FUNCTION [J].