Large scale 2D semiconductor MoS₂ on superconducting YBa₂Cu₃O₇ for proximity devices

Coupling two-dimensional (2D) materials like graphene with HTc superconductors allows for new physical properties, induced by the proximity effect and the intrinsic tunability of 2Ds[1]. In this context, transition metal dichalcogenides (TMD) such as MoS₂ are interesting because they enable studying the proximity behavior in presence of spin-orbit coupling. While most of the existing experimental work is based on s-wave superconductors, the specificities of d-wave ones expectedly enrich the resulting physics. We will first discuss how stable CVD-grown graphene can be transferred onto YBa₂Cu₃O₇ (YBCO) and lead to robust superconducting proximity effect probed in solid state devices[2-3]. We will then discuss how in order to realize similar TMD-based devices a different approach has to be tackled, which is the direct growth of MoS₂ onto YBCO. This process, based on the growth of TMD materials by Pulsed-Laser Deposition (PLD) [4-5], preserves the superconducting properties of the cuprate and further allows us to limit the processing steps. We will discuss the requirements to both grow MoS₂ and preserve high-Tc superconductivity as well as electronic transport characterizations of realized devices.



[1] D. Perconte. et al. Ann. Phys. 534, 2100559 (2022). REVIEW

[2] D. Perconte, et al. , Nat. Phys. 14, 25 (2018).

[3] D. Perconte, K. Seurre et al. , Phys. Rev. Lett. 125, (2020).

[4] F. Godel, ACS Appl. Nano Mater. 3, 8 (2020)

[5] V. Zatko, ACS Nano 15, 8 (2021)