Self-optimized superconductivity attainable by interlayer phase separation at cuprate interfaces

Abstract

Resolving how and why maximized superconducting amplitude can be self-organized at interfaces opens perspectives for design.

Correlation-induced superconductivity dynamically stabilized and enhanced by laser irradiation

“…The exact answer is not available even for the simple Hubbard model, and the quantitative range of the superconducting dome as well as the charge inhomogeneous region depend on details of the accuracy in numerical methods ( 4 – 9 , 21 – 23 ). However, the tight connection between the superconductivity and the charge inhomogeneities is a widely observed tendency ( 2 – 9 , 25 ) in accordance with the tendency in the experimental observations ( 1 ). The strong-coupling superconductivity can be achieved only when the effective attractive interaction becomes strong, whereas too strong static attraction results in the abovementioned aggregation of electrons with charge inhomogeneity, which constitutes a “double-edged sword.”…”

Competition among various charge-inhomogeneous states and d -wave superconducting state in Hubbard models on square lattices

“…Understanding their common route and distinctions revealed here will help designing ways of suppressing the stripe and stabilizing the SC state simultaneously. Some attempts were already made 16,65 , and extensive studies along this line are intriguing challenging issues in the future.…”

Superconductivity on Interfaces of Nonsuperconducting Granules La2CuO4 and La1.56Sr0.44CuO4

“…Also the critical current density J c depends on the d/l s ratio. From ESCM it follows that J c ≈ J cb (1 -2l s /d) 3 , where J cb is the critical current density of the sample with d >> l s [11]. This relation allows us to estimate the d/l s ratio from the observed asymmetry of magnetization loops.…”

“…Recently [2,3], it was shown that an interface superconductivity arises on the boundary of LCO and La 1.56 Sr 0.44 CuO 4 films. Study of such films is limited by the complexity of their synthesis (a layer-by-layer molecular beam epitaxy).…”