Parity of the pairing bosons in a high-temperature Pb-Bi2Sr2CaCu2O8 bilayer superconductor by angle-resolved photoemission spectroscopy

被引：25

作者：

Borisenko, SV

Kordyuk, AA

Koitzsch, A

Fink, J

Geck, J

Zabolotnyy, V

Knupfer, M

Büchner, B

Berger, H

Falub, M

Shi, M

Krempasky, J

Patthey, L

机构：

[1] IFW Dresden, Leibniz Inst Solid State Res, D-01171 Dresden, Germany

[2] Natl Acad Sci Ukraine, Inst Met Phys, UA-03142 Kiev, Ukraine

[3] Ecole Polytech Fed Lausanne, Inst Phys Complex Matter, CH-1015 Lausanne, Switzerland

[4] Paul Scherrer Inst, Swiss Light Source, CH-5234 Villigen, Switzerland

[5] Ecole Polytech Fed Lausanne, Lab Spect Elect, CH-1015 Lausanne, Switzerland

来源：

PHYSICAL REVIEW LETTERS | 2006年 / 96卷 / 06期

关键词：

D O I：

10.1103/PhysRevLett.96.067001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report the observation of a novel effect in the bilayer Pb-Bi2Sr2CaCu2O8 (Pb-Bi2212) high-T-c superconductor by means of angle-resolved photoemission with circularly polarized excitation. Different scattering rates, determined as a function of energy separately for the bonding and antibonding copper-oxygen bands, strongly imply that the dominating scattering channel is odd with respect to layer exchange within a bilayer. This is inconsistent with a phonon-mediated scattering and favors the participation of the odd collective spin excitations in the scattering mechanism in near-nodal regions of the k space, suggesting a magnetic nature of the pairing mediator.

引用

页数：4

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