Raman vertex in cuprates: Role of the extended Van Hove singularity

被引：8
|
作者：
Sherman, EY [1 ]
机构：
[1] Rhein Westfal TH Aachen, Inst Phys 2, D-52056 Aachen, Germany
[2] Moscow Inst Phys & Technol, Dolgoprudnyi 141700, Russia
来源：
PHYSICAL REVIEW B | 1998年 / 58卷 / 21期
关键词：
D O I：
10.1103/PhysRevB.58.14187
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We consider the bare electronic Raman vertex for CuO2 planes near an extended Van Hove singularity. It is shown than even for a simple band structure the vertex is rather complicated and contains many Brillouin-zone harmonics. The vertex anisotropy is larger than the anisotropy of the Fermi surface and even in the simplest cases does not follow the effective-mass anisotropy being much smaller than the latter one. [S0163-1829(98)01045-5].
引用
收藏
页码：14187 / 14190
页数：4
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