Spin Correlations and Magnetic Order in Nonsuperconducting Nd_{2-x}Ce_xCuO_4

Preprint

1 November 2003

preprint
Published by arXiv in arXiv

Abstract

We report quantitative neutron scattering measurements of the evolution with doping of the antiferromagnetic correlations and the ordered moment of as-grown, non-superconducting Nd2-xCexCuO4(0 < x < 0.18). The instantaneous correlation length is surprisingly well described by our quantum Monte Carlo calculations for the randomly site-diluted nearest-neighbor spin-1/2 square-lattice Heisenberg antiferromagnet. However, quantum fluctuations have a stronger effect on the ordered moment, which decreases more rapidly than for the model system. For oxygen-reduced, non-superconducting Nd2-xCexCuO4(x < 0.10) the moment decreases even more rapidly, at a rate that is good agreement with recent theory for the one-band Hubbard model.

Keywords

SUPERCONDUCTING ND2
NONSUPERCONDUCTING
ANTIFERROMAGNET
ORDERED MOMENT
ND2 XCEXCUO4
MONTE CARLO
EVOLUTION
XCEXCUO4

All Related Versions

Version 1, 2003-07-04, ArXiv
Version 2, 2003-11-01, ArXiv
Version 3, 2004-02-24, ArXiv
Version 4, 2004-05-13, ArXiv
Version 5, 2004-08-24, ArXiv
Published version: Physical Review Letters, 93 (2), 027002.

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