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

作者：de Mello E V L^*

来源：EPL, 2012, 98(5): 57008.

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 T-c(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 T-c(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.

• 出版日期2012-6