Imaging quasiparticle interference in Bi2Sr2CaCu2O8+δ

被引：544

作者：

Hoffman, JE

McElroy, K

Lee, DH

Lang, KM

Eisaki, H

Uchida, S

Davis, JC ^{[1
]}

机构：

[1] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA

[2] Natl Inst Stand & Technol, Div Electromagnet Technol, Boulder, CO 80305 USA

[3] Stanford Univ, Dept Appl Phys, Stanford, CA 94305 USA

[4] Agcy Ind Sci & Technol, Tsukuba, Ibaraki 3058568, Japan

[5] Univ Tokyo, Dept Superconduct, Tokyo 1138656, Japan

[6] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA

来源：

SCIENCE | 2002年 / 297卷 / 5584期

关键词：

D O I：

10.1126/science.1072640

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Scanning tunneling spectroscopy of the high-T-c superconductor Bi2Sr2CaCu2O8+delta reveals weak, incommensurate, spatial modulations in the tunneling conductance. Images of these energy-dependent modulations are Fourier analyzed to yield the dispersion of their wavevectors. Comparison of the dispersions with photoemission spectroscopy data indicates that quasiparticle interference, due to elastic scattering between characteristic regions of momentum-space, provides a consistent explanation for the conductance modulations, without appeal to another order parameter. These results refocus attention on quasiparticle scattering processes as potential explanations for other incommensurate phenomena in the cuprates. The momentum-resolved tunneling spectroscopy demonstrated here also provides a new technique with which to study quasiparticles in correlated materials.

引用

页码：1148 / 1151

页数：5

共 29 条

[1] Slave boson approach to neutron scattering in YBa2Cu3O6+y superconductors [J].