Holographic Superconductor/Insulator Transition at Zero Temperature

TL;DR

This paper investigates a holographic model of a superconductor/insulator transition at zero temperature, revealing a complex phase diagram with similarities to high-Tc superconductor theories.

Contribution

It demonstrates a superconductor/insulator transition in a 5D AdS gravity model with a charged scalar, incorporating confinement effects and phase structure analysis.

Findings

Phase transition at zero temperature as chemical potential varies

Rich phase diagram with confinement/deconfinement features

Similarity to RVB approach in high-Tc superconductors

Abstract

We analyze the five-dimensional AdS gravity coupled to a gauge field and a charged scalar field. Under a Scherk-Schwarz compactification, we show that the system undergoes a superconductor/insulator transition at zero temperature in 2+1 dimensions as we change the chemical potential. By taking into account a confinement/deconfinement transition, the phase diagram turns out to have a rich structure. We will observe that it has a similarity with the RVB (resonating valence bond) approach to high-Tc superconductors via an emergent gauge symmetry.