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Title: Phonon Screening in High-Temperature Superconductors

Abstract

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 Pr{sub 1.85} Ce{sub 0.15} CuO{sub 4} and YBa{sub 2}Cu {sub 3}O{sub 6.95} . Oscillator strengths indicate that the screening of these modes is poor or totally absent. These materials are compared with {eta}-Mo{sub 4}O{sub 11} , 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. (c) 2000 The American Physical Society.

Authors:
 [1];  [2];  [2];  [3];  [3];  [3];  [4];  [4];  [5];  [5]
  1. Department of Physics, Brookhaven National Laboratory, Upton, New York 11973 (United States)
  2. Department of Physics, Simon Fraser University, Burnaby, British Columbia, Canada V5A 1S6 (Canada)
  3. Department of Physics and Astronomy, University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z1 (Canada)
  4. Graduate School of Advanced Sciences of Matter, Hiroshima University, Higashi-Hiroshima 739-8526, (Japan)
  5. Center for Superconductivity Research, Department of Physics and Astronomy, University of Maryland, College Park, Maryland 20742 (United States)
Publication Date:
OSTI Identifier:
20216798
Resource Type:
Journal Article
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 84; Journal Issue: 23; Other Information: PBD: 5 Jun 2000; Journal ID: ISSN 0031-9007
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; HIGH-TC SUPERCONDUCTORS; PRASEODYMIUM OXIDES; CERIUM OXIDES; COPPER OXIDES; YTTRIUM OXIDES; BARIUM OXIDES; PHONONS; SCREENING; OSCILLATOR STRENGTHS; LATTICE VIBRATIONS; FLUCTUATIONS; EXPERIMENTAL DATA

Citation Formats

Homes, C. C., McConnell, A. W., Clayman, B. P., Bonn, D. A., Liang, Ruixing, Hardy, W. N., Inoue, M., Negishi, H., Fournier, P., and Greene, R. L. Phonon Screening in High-Temperature Superconductors. United States: N. p., 2000. Web. doi:10.1103/PhysRevLett.84.5391.
Homes, C. C., McConnell, A. W., Clayman, B. P., Bonn, D. A., Liang, Ruixing, Hardy, W. N., Inoue, M., Negishi, H., Fournier, P., & Greene, R. L. Phonon Screening in High-Temperature Superconductors. United States. doi:10.1103/PhysRevLett.84.5391.
Homes, C. C., McConnell, A. W., Clayman, B. P., Bonn, D. A., Liang, Ruixing, Hardy, W. N., Inoue, M., Negishi, H., Fournier, P., and Greene, R. L. Mon . "Phonon Screening in High-Temperature Superconductors". United States. doi:10.1103/PhysRevLett.84.5391.
@article{osti_20216798,
title = {Phonon Screening in High-Temperature Superconductors},
author = {Homes, C. C. and McConnell, A. W. and Clayman, B. P. and Bonn, D. A. and Liang, Ruixing and Hardy, W. N. and Inoue, M. and Negishi, H. and Fournier, P. and Greene, R. L.},
abstractNote = {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 Pr{sub 1.85} Ce{sub 0.15} CuO{sub 4} and YBa{sub 2}Cu {sub 3}O{sub 6.95} . Oscillator strengths indicate that the screening of these modes is poor or totally absent. These materials are compared with {eta}-Mo{sub 4}O{sub 11} , 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. (c) 2000 The American Physical Society.},
doi = {10.1103/PhysRevLett.84.5391},
journal = {Physical Review Letters},
issn = {0031-9007},
number = 23,
volume = 84,
place = {United States},
year = {2000},
month = {6}
}