Topological Confinement and Superconductivity

TL;DR

This paper introduces a topological confinement mechanism leading to superconductivity in a 1D Kondo lattice model derived from a two-band Hubbard Hamiltonian, highlighting a novel pairing process from repulsive interactions.

Contribution

It derives a new Kondo lattice model from a two-band Hubbard model and demonstrates topological confinement as a pairing mechanism causing superconductivity.

Findings

Superconducting correlations dominate in the 1D model.

The mechanism arises from the interplay of antiferromagnetism and delocalization.

A new model links topological confinement to superconductivity.

Abstract

We derive a Kondo Lattice model with a correlated conduction band from a two-band Hubbard Hamiltonian. This mapping allows us to describe the emergence of a robust pairing mechanism in a model that only contains repulsive interactions. The mechanism is due to topological confinement and results from the interplay between antiferromagnetism and delocalization. By using Density-Matrix-Renormalization-Group (DMRG), we demonstrate that this mechanism leads to dominant superconducting correlations in a 1D-system.