Higher-grade hybrid model: enhancement of supercoductivity

TL;DR

This paper explores how long-range interactions and dimensionality influence superconductivity enhancement in layered materials, using a higher-grade hybrid model to analyze both bulk and finite-layer structures.

Contribution

It introduces a higher-grade hybrid model to study superconductivity enhancement through long-range couplings and 3D effects in layered superconductors.

Findings

Long-range couplings can enhance superconductivity.

3D superconductivity can be stronger than 2D.

Differences between homogeneous bulk and layered structures are analyzed.

Abstract

The discussion of enhancement of superconductivity is presented in the framework of the higher-grade hybrid model of layered superconductors. The enhancement is considered from the following two points of view: (i) as a result of long-range couplings with respects to the short distance ones, and (ii) the enhancement of 3D superconductivity with respect to the 2D. Two important cases are distinguished: homogeneous bulk supercoducting materials and superconducting structures composed of a finite number of layers.