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

Preprint

24 February 2004

preprint
Published by arXiv in arXiv

Abstract

We report quantitative neutron scattering measurements of the evolution with doping of the N\'eel temperature, the antiferromagnetic correlations, and the ordered moment of as-grown, non-superconducting \NCCO ($0 \le x \le 0.18$). 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 quenched-disorder model.

Keywords

ANTIFERROMAGNET
CE_XCUO_4
EVOLUTION
MAGNETIC ORDER
MONTE CARLO
NONSUPERCONDUCTING
ORDERED MOMENT
SCATTERING
SPIN CORRELATIONS
SUPERCONDUCTING

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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