Disorder-enhanced superconductivity in a quasi-one-dimensional strongly correlated system

We perform an analytical and numerical study of a superconducting instability in quasi-one-dimensional (quasi-1D) disordered systems. Modeling them as an array of Luttinger liquids with Josephson-type interchain coupling, we employed renormalization-group analysis with an extensive search for parameters that support superconductivity enhancement. We have found that this phenomenon is possible in the parameters range that support a latent disorder-driven phase transition between charge- and spin-density-wave phases. Our results may explain the experimental observation of disorder-enhanced superconductivity.

Automated summary

The study investigates superconducting instability in quasi-1D disordered systems, modeling them as an array of Luttinger liquids with Josephson-type interchain coupling. The research utilizes renormalization-group analysis to search for parameters supporting superconductivity enhancement, finding that this phenomenon may occur within a specific range of parameters. This could potentially explain the experimental observation of disorder-enhanced superconductivity.