Description and connection between the oxygen order evolution and the superconducting transition in La2CuO4+y

A recent hallmark set of experiments by Poccia et al. in cuprate superconductors related in a direct way, for the first time, time ordering (t) of oxygen interstitials in initially disordered La2CuO4+y with the superconducting transition temperature Tc(t). We provide here a description of the time o...

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Bibliographic Details
Published in:Europhysics letters 2012-06, Vol.98 (5)
Main Author: de Mello, E. V. L.
Format: Article
Language:English
Subjects:
74.20.Mn
74.62.En
74.81.Fa
Online Access:Get full text
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Summary:A recent hallmark set of experiments by Poccia et al. in cuprate superconductors related in a direct way, for the first time, time ordering (t) of oxygen interstitials in initially disordered La2CuO4+y with the superconducting transition temperature Tc(t). We provide here a description of the time ordering forming pattern domains and show, through the local free energy, how it affects the superconducting interaction. Self-consistent calculations in this granular structure with Josephson coupling among the domains reveal that the superconducting interaction is scaled by the local free energy and capture the details of Tc(t). The accurate reproduction of these apparently disconnected phenomena establishes routes to the important physical mechanisms involved in sample production and the origin of the superconductivity of cuprates.
ISSN:0295-5075
1286-4854
DOI:10.1209/0295-5075/98/57008