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Title: Raman spectra of Hg-based superconductors: Effect of oxygen defects

Abstract

Polarized micro-Raman scattering measurements have been performed on the five members of the HgBa{sub 2}Ca{sub {ital n}{minus}1}Cu{sub {ital n}}O{sub 2{ital n}+2+{delta}} ({ital n}=1, 2, 3, 4, and 5) high-{ital T}{sub {ital c}} superconductor family. A systematic evolution of the spectrum, which mainly involves oxygen-related phonons around 590, 570, 540, and 470 cm{sup {minus}1}, with an increasing number of CuO{sub 2} layers, has been observed. Local laser annealing measurements clearly demonstrate that all these phonons are closely related to interstitial oxygen in the HgO{sub {delta}} planes. The origin of the spectrum evolution with the number of CuO{sub 2} layers lies in the variation of interstitial oxygen content. {copyright} {ital 1996 The American Physical Society.}

Authors:
;  [1]; ;  [2]; ;  [3]
  1. Max-Planck-Institut fuer Festkoerperforschung, Heisenbergstrasse 1, D-70569 Stuttgart (Germany)
  2. Department of Physics and the Texas Center for Superconductivity at the University of Houston, Houston, Texas 77204-5932 (United States)
  3. Laboratoire de Cristallographie, CNRS-Universite Joseph Fourier, BP 166, 38042 Grenoble Cedex 09 (France)
Publication Date:
OSTI Identifier:
383239
Resource Type:
Journal Article
Journal Name:
Physical Review, B: Condensed Matter
Additional Journal Information:
Journal Volume: 54; Journal Issue: 9; Other Information: PBD: Sep 1996
Country of Publication:
United States
Language:
English
Subject:
66 PHYSICS; HIGH-TC SUPERCONDUCTORS; RAMAN SPECTRA; CUPRATES; MERCURY OXIDES; BARIUM OXIDES; PHONONS; INTERSTITIALS; OXYGEN; CRYSTAL DEFECTS; OPTICAL PHONONS

Citation Formats

Zhou, X, Cardona, M, Chu, C W, Lin, Q M, Loureiro, S M, and Marezio, M. Raman spectra of Hg-based superconductors: Effect of oxygen defects. United States: N. p., 1996. Web. doi:10.1103/PhysRevB.54.6137.
Zhou, X, Cardona, M, Chu, C W, Lin, Q M, Loureiro, S M, & Marezio, M. Raman spectra of Hg-based superconductors: Effect of oxygen defects. United States. doi:10.1103/PhysRevB.54.6137.
Zhou, X, Cardona, M, Chu, C W, Lin, Q M, Loureiro, S M, and Marezio, M. Sun . "Raman spectra of Hg-based superconductors: Effect of oxygen defects". United States. doi:10.1103/PhysRevB.54.6137.
@article{osti_383239,
title = {Raman spectra of Hg-based superconductors: Effect of oxygen defects},
author = {Zhou, X and Cardona, M and Chu, C W and Lin, Q M and Loureiro, S M and Marezio, M},
abstractNote = {Polarized micro-Raman scattering measurements have been performed on the five members of the HgBa{sub 2}Ca{sub {ital n}{minus}1}Cu{sub {ital n}}O{sub 2{ital n}+2+{delta}} ({ital n}=1, 2, 3, 4, and 5) high-{ital T}{sub {ital c}} superconductor family. A systematic evolution of the spectrum, which mainly involves oxygen-related phonons around 590, 570, 540, and 470 cm{sup {minus}1}, with an increasing number of CuO{sub 2} layers, has been observed. Local laser annealing measurements clearly demonstrate that all these phonons are closely related to interstitial oxygen in the HgO{sub {delta}} planes. The origin of the spectrum evolution with the number of CuO{sub 2} layers lies in the variation of interstitial oxygen content. {copyright} {ital 1996 The American Physical Society.}},
doi = {10.1103/PhysRevB.54.6137},
journal = {Physical Review, B: Condensed Matter},
number = 9,
volume = 54,
place = {United States},
year = {1996},
month = {9}
}