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Spin Gaps and Spin Dynamics in La2-xSrxCuO4 and YBa2Cu3O7δ

A. J. Millis, H. Monien

cond-matarXiv:cond-mat/9209006

Abstract

A magnetic susceptibility which decreases with decreasing temperature is observed in all CuO2 based superconductors with less than optimal doping. We propose that in La2-x Srx CuO4 this is due to antiferromagnetic ordering which is prevented by the low spatial dimensionality while in YBa2 Cu3 O6.6 it is due to the interplay between antiferromagnetic fluctuations within a plane and singlet pairing of electrons between nearest neighbor planes.

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