Ferroelectricity-tuned band topology and superconductivity in two-dimensional materials and related heterostructures

TL;DR

This paper reviews recent progress in understanding how ferroelectricity influences band topology and superconductivity in two-dimensional materials, highlighting theoretical predictions and experimental advances for novel quantum phenomena and device applications.

Contribution

It provides a comprehensive overview of the latest theoretical and experimental studies on ferroelectricity-tuned superconductivity and topological phases in 2D materials and heterostructures.

Findings

Predictive studies show coupling between ferroelectricity and topology or superconductivity.

Experimental evidence of ferroelectricity-tuned superconductivity in 2D materials.

Proposals for new 2D systems with combined ferroelectricity and superconductivity.

Abstract

Ferroelectricity, band topology, and superconductivity are respectively local, global, and macroscopic properties of quantum materials, and understanding their mutual couplings offers unique opportunities for exploring rich physics and enhanced functionalities. In this mini-review, we attempt to highlight some of the latest advances in this vibrant area, focusing in particular on ferroelectricity-tuned superconductivity and band topology in two-dimensional (2D) materials and related heterostructures. We will first present results from predictive studies of the delicate couplings between ferroelectricity and topology or superconductivity based on first-principles calculations and phenomenological modeling, with ferroelectricity-enabled topological superconductivity as an appealing objective. Next, we will cover the latest advances on experimental studies of ferroelectricity-tuned superconductivity based on different 2D materials or van der Waals heterostructures. Finally, as perspectives, we will outline schemes that may allow to materialize new types of 2D systems that simultaneously harbor ferroelectricity and superconductivity, or that may lead to enhanced ferroelectric superconductivity, ferroelectric topological superconductivity, and new types of superconducting devices such as superconducting diodes.