Antiferromagnetic Correlations and the Pseudogap in HTS Cuprates
J. L. Tallon
TL;DR
This paper presents evidence linking the disappearance of antiferromagnetic correlations to the closing of the pseudogap in cuprate superconductors, highlighting their role in weakening superconductivity.
Contribution
It provides experimental evidence connecting AF correlations with the pseudogap and their impact on superconductivity in HTS cuprates.
Findings
AF correlations vanish at the T=0 metal-insulator transition
Pseudogap energy drops to zero at this transition
AF fluctuations weaken superconductivity by reducing condensation energy
Abstract
Evidence is presented from NMR 1/T1T and ARPES data for the sudden disappearance of 2D antiferromagnetic (AF) correlations in the lightly overdoped region (p=0.19) at the T=0 metal-insulator transition where the pseudogap energy falls to zero. AF fluctuations thus appear to be intimately associated with the pseudogap and serve primarily to weaken superconductivity, strongly reducing the condensation energy and superfluid density.
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Taxonomy
TopicsPhysics of Superconductivity and Magnetism · Superconducting Materials and Applications · Advanced Condensed Matter Physics