Doping dependence of the pseudogap in La2-xSrxCuO4

被引：73

作者：

Naeini, JG

Chen, XK

Irwin, JC

Okuya, M ^{[1
]}

Kimura, T

Kishio, K

机构：

[1] Simon Fraser Univ, Dept Phys, Burnaby, BC V5A 1S6, Canada

[2] Univ Tokyo, Dept Superconduct, Bunkyo Ku, Tokyo 113, Japan

来源：

PHYSICAL REVIEW B | 1999年 / 59卷 / 14期

关键词：

D O I：

10.1103/PhysRevB.59.9642

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report the results of Raman scattering experiments on single crystals of La2-xSrxCuO4 that span the range from underdoped (x=0.10) to overdoped (x=0.22). The spectra are consistent with the existence of a strong anisotropic quasiparticle interaction that results in a normal state depletion of spectral weight from regions of the Fermi surface located near the zone axes. The strength of the interaction decreases rapidly with increasing hole concentration and the spectral evidence for the pseudogap vanishes when the optimum doping level is reached. The results suggest that the pseudogap and superconducting gap arise from different mechanisms. [S0163-1829(99)09913-0].

引用

页码：9642 / 9648

页数：7

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