Publication
Solid State Communications
Paper

The curious case of the Cu2+ electron paramagnetic resonance in high-Tc superconductors and related antiferromagnets

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Abstract

Possible reasons behind the total absence of EPR signals from divalent copper ions in copper oxide superconductors and related "two-dimensional" antiferromagnetic insulators are explored. The non-observability of the signal in the metallic states can plausibly be attributed to short spin-lattice relaxation times due to spinon-holon scatterings. However, the absence of resonance in the insulators at high temperatures suggests that either the correlation lengths have been grossly underestimated even for compounds with very low Neel temperatures, or straightforward application of the conventional theory of antiferromagnetism is not valid. © 1989.

Date

01 Jan 1989

Publication

Solid State Communications

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