One-step synthesis of van der Waals heterostructures of graphene and 2D superconducting a-Mo2C

TL;DR

This paper reports a one-step chemical vapor deposition method to synthesize large-scale van der Waals heterostructures of graphene and 2D superconducting a-Mo2C, enabling integration of superconductivity into 2D heterostructures.

Contribution

It introduces a novel one-step CVD process for creating high-quality graphene/a-Mo2C heterostructures with superconducting properties.

Findings

Successful synthesis of large-scale vdW heterostructures

Confirmation of 2D superconductivity via STM

Integration of superconductivity into heterostructures

Abstract

Assembling different two-dimensional (2D) crystals, covering a very broad range of properties, into van der Waals (vdW) heterostructures enables the unprecedented possibilities for combining the best of different ingredients in one objective material. So far, metallic, semiconducting, and insulating 2D crystals have been used successfully in making functional vdW heterostructures with properties by design. Here, we expand 2D superconducting crystals as a building block of the vdW hererostructures. A one-step growth of large-scale high-quality vdW heterostructures of graphene and 2D superconducting a-Mo2C by using chemical vapor deposition (CVD) method is reported. The superconductivity and its 2D nature of the heterostructures are characterized by our scanning tunneling microscopy (STM) measurements. This adds the 2D superconductivity, the most attractive property of condensed matter physics, to the vdW heterostructures.