In-plane polarized collective modes in detwinned YBa2Cu3O6.95 observed by spectral ellipsometry

被引：38

作者：

Bernhard, C

Holden, T

Humlícek, J

Munzar, D

Golnik, A

Kläser, M

Wolf, T

Carr, L

Homes, C

Keimer, B

Cardona, M

机构：

[1] Max Planck Inst Festkorperforsch, D-70569 Stuttgart, Germany

[2] Masaryk Univ, Inst Condensed Matter Phys, CZ-61137 Brno, Czech Republic

[3] Warsaw Univ, Inst Expt Phys, PL-00681 Warsaw, Poland

[4] Forschungszentrum Karlsruhe, ITP, D-76021 Karlsruhe, Germany

[5] Brookhaven Natl Lab, Natl Synchrotron Light Source, Upton, NY 11973 USA

来源：

SOLID STATE COMMUNICATIONS | 2002年 / 121卷 / 2-3期

关键词：

high-T-c superconductors; dielectric response; electron-phonon interactions; light absorption and reflection;

D O I：

10.1016/S0038-1098(01)00451-3

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The in-plane dielectric response of detwinned YBa2Cu3O6.95 has been studied by far-infared ellipsometry. A surprisingly large number of in-plane polarized modes are observed. Some of them correspond to pure phonon modes. Others possess a large electronic contribution which strongly increases in the superconducting state. The free carrier response and the collective modes exhibit a Pronounced a-b anisotropy. We discuss our results in terms of a charge density wave state in the 1-D CuO chains and induced charge density fluctuations within the 2-D CuO2 planes. (C) 2002 Elsevier Science Ltd. All rights reserved.

引用

页码：93 / 97

页数：5

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