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Title: Incoherent inelastic neutron scattering study of the low-frequency phonons in superconducting La/sub 1. 85/Sr/sub 0. 15/CuO/sub 4/ and antiferromagnetic La/sub 2/CuO/sub 4/

Abstract

The generalized phonon density of states (DOS) has been measured for the ceramic superconductor La/sub 1.85/Sr/sub 0.15/CuO/sub 4/ (T/sub 0/ = 38 K) and antiferromagnetic (T/sub N/ = 250 K) La/sub 2/CuO/sub 4/ from 0.1--100 meV at temperatures between 250 and 30 K. For the superconductor the phonon spectrum, which was temperature independent over the whole range, contained major peaks at 11.5, 18.5, 23.8, 29.5, 38, 55.2, 78 meV while La/sub 2/CuO/sub 4/ had peaks at 12, 18.5 (24), 29.5, 39.8, 57.2, 80 meV. Increased scattering in the range 5--8 meV, the only feature in the DOS of La/sub 2/CuO/sub 4/ which had no analogue in the superconductor was most apparent at 250 K decreasing with temperature to become insignificant at 30 K.

Authors:
; ; ;
Publication Date:
Research Org.:
Oxford University, Inorganic Chemistry Laboratory, South Parks Road, Oxford OX1chemically bond3QR, United Kingdom
OSTI Identifier:
5741452
Resource Type:
Journal Article
Journal Name:
Phys. Rev. B: Condens. Matter; (United States)
Additional Journal Information:
Journal Volume: 37:4
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; COPPER OXIDES; PHONONS; LANTHANUM OXIDES; STRONTIUM OXIDES; ANTIFERROMAGNETIC MATERIALS; INELASTIC SCATTERING; LOW TEMPERATURE; NEUTRON DIFFRACTION; SUPERCONDUCTORS; TEMPERATURE DEPENDENCE; VERY LOW TEMPERATURE; ALKALINE EARTH METAL COMPOUNDS; CHALCOGENIDES; COHERENT SCATTERING; COPPER COMPOUNDS; DIFFRACTION; LANTHANUM COMPOUNDS; MAGNETIC MATERIALS; MATERIALS; OXIDES; OXYGEN COMPOUNDS; QUASI PARTICLES; RARE EARTH COMPOUNDS; SCATTERING; STRONTIUM COMPOUNDS; TRANSITION ELEMENT COMPOUNDS; 360204* - Ceramics, Cermets, & Refractories- Physical Properties; 656100 - Condensed Matter Physics- Superconductivity

Citation Formats

Rosseinsky, M J, Prassides, K, Day, P, and Dianoux, A J. Incoherent inelastic neutron scattering study of the low-frequency phonons in superconducting La/sub 1. 85/Sr/sub 0. 15/CuO/sub 4/ and antiferromagnetic La/sub 2/CuO/sub 4/. United States: N. p., 1988. Web. doi:10.1103/PhysRevB.37.2231.
Rosseinsky, M J, Prassides, K, Day, P, & Dianoux, A J. Incoherent inelastic neutron scattering study of the low-frequency phonons in superconducting La/sub 1. 85/Sr/sub 0. 15/CuO/sub 4/ and antiferromagnetic La/sub 2/CuO/sub 4/. United States. https://doi.org/10.1103/PhysRevB.37.2231
Rosseinsky, M J, Prassides, K, Day, P, and Dianoux, A J. 1988. "Incoherent inelastic neutron scattering study of the low-frequency phonons in superconducting La/sub 1. 85/Sr/sub 0. 15/CuO/sub 4/ and antiferromagnetic La/sub 2/CuO/sub 4/". United States. https://doi.org/10.1103/PhysRevB.37.2231.
@article{osti_5741452,
title = {Incoherent inelastic neutron scattering study of the low-frequency phonons in superconducting La/sub 1. 85/Sr/sub 0. 15/CuO/sub 4/ and antiferromagnetic La/sub 2/CuO/sub 4/},
author = {Rosseinsky, M J and Prassides, K and Day, P and Dianoux, A J},
abstractNote = {The generalized phonon density of states (DOS) has been measured for the ceramic superconductor La/sub 1.85/Sr/sub 0.15/CuO/sub 4/ (T/sub 0/ = 38 K) and antiferromagnetic (T/sub N/ = 250 K) La/sub 2/CuO/sub 4/ from 0.1--100 meV at temperatures between 250 and 30 K. For the superconductor the phonon spectrum, which was temperature independent over the whole range, contained major peaks at 11.5, 18.5, 23.8, 29.5, 38, 55.2, 78 meV while La/sub 2/CuO/sub 4/ had peaks at 12, 18.5 (24), 29.5, 39.8, 57.2, 80 meV. Increased scattering in the range 5--8 meV, the only feature in the DOS of La/sub 2/CuO/sub 4/ which had no analogue in the superconductor was most apparent at 250 K decreasing with temperature to become insignificant at 30 K.},
doi = {10.1103/PhysRevB.37.2231},
url = {https://www.osti.gov/biblio/5741452}, journal = {Phys. Rev. B: Condens. Matter; (United States)},
number = ,
volume = 37:4,
place = {United States},
year = {Mon Feb 01 00:00:00 EST 1988},
month = {Mon Feb 01 00:00:00 EST 1988}
}