Excitation energy map of high-energy dispersion anomalies in cuprates

被引：32

作者：

Inosov, D. S. ^{[1
]}

Schuster, R. ^{[1
]}

Kordyuk, A. A. ^{[1
,2
]}

Fink, J. ^{[1
,3
]}

Borisenko, S. V. ^{[1
]}

Zabolotnyy, V. B. ^{[1
]}

Evtushinsky, D. V. ^{[1
]}

Knupfer, M. ^{[1
]}

Buechner, B. ^{[1
]}

Follath, R. ^{[3
]}

Berger, H. ^{[4
]}

机构：

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

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

[3] BESSY, D-12489 Berlin, Germany

[4] Ecole Polytech Fed Lausanne, Inst Phys Mat Complexe, CH-1015 Lausanne, Switzerland

来源：

PHYSICAL REVIEW B | 2008年 / 77卷 / 21期

关键词：

D O I：

10.1103/PhysRevB.77.212504

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The anomalous high-energy dispersion of the conductance band in the high-T(c) superconductor Bi(Pb)(2)Sr(2)CaCu(2)O(8+delta) (Pb-Bi2212) has been extensively mapped by angle-resolved photoemission spectroscopy as a function of excitation energy in the range from 34 to 116 eV. Two distinctive types of dispersion behavior are observed around 0.6 eV binding energy, which alternate as a function of photon energy. The continuous transitions observed between the two kinds of behavior near 50, 70, and 90 eV photon energies allow one to exclude the possibility that they originate from the interplay between the bonding and antibonding bands. The effects of three-dimensionality can also be excluded as a possible origin of the excitation energy dependence, as the large period of the alterations is inconsistent with the lattice constant in this material. We therefore confirm that the strong photon energy dependence of the high-energy dispersion in cuprates originates mainly from the photoemission matrix element that suppresses the photocurrent in the center of the Brillouin zone.

引用

页数：3

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