Quasiparticle formation and optical sum rule violation in cuprate superconductors -: art. no. 100506

被引：49

作者：

Norman, MR

Pépin, C

机构：

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

[2] CEA Saclay, SPhT, LOrme Merisiers, F-91191 Gif Sur Yvette, France

来源：

PHYSICAL REVIEW B | 2002年 / 66卷 / 10期

关键词：

D O I：

10.1103/PhysRevB.66.100506

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Using a simple model for the frequency dependent scattering rate, we evaluate the in-plane optical integral for cuprate superconductors in the normal and superconducting states. In the overdoped region, this integral is conserved. In the optimal and underdoped region, though, the optical integrals differ, implying a lowering of the in-plane kinetic energy in the superconducting state. This sum rule violation, due to the difference of the non-Fermi-liquid normal state and the superconducting Fermi-liquid state, has a magnitude comparable to recent experimental results.

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收藏

页码：1005061 / 1005064

页数：4

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