Phonon screening in high-temperature superconductors

被引：32

作者：

Homes, CC ^{[1
]}

McConnell, AW

Clayman, BP

Bonn, DA

Liang, RX

Hardy, WN

Inoue, M

Negishi, H

Fournier, P

Greene, RL

机构：

[1] Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA

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

[3] Univ British Columbia, Dept Phys & Astron, Vancouver, BC V6T 1Z1, Canada

[4] Hiroshima Univ, Grad Sch Adv Sci Matter, Higashihiroshima 7398526, Japan

[5] Univ Maryland, Dept Phys & Astron, Ctr Superconduct Res, College Pk, MD 20742 USA

来源：

PHYSICAL REVIEW LETTERS | 2000年 / 84卷 / 23期

关键词：

D O I：

10.1103/PhysRevLett.84.5391

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

In good conductors optical phonons are usually screened, and therefore not observed. However, sharp features due to infrared-active modes in the copper-oxygen planes are observed in the optical conductivity of Pr1.85Ce0.15CuO4 and YBa2Cu3O6.95. Oscillator strengths indicate that the screening of these modes is poor or totally absent. These materials are compared with eta-Mo4O11, in which lattice modes appear suddenly below the charge-density wave transition. It is proposed that poor screening in the cuprates originates from fluctuating charge inhomogeneities in the copper-oxygen planes.

引用

页码：5391 / 5394

页数：4

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