Superconductivity enhancement in phase-engineered molybdenum carbide/disulfide vertical heterostructures.

ABSTRACT: Stacking layers of atomically thin transition-metal carbides and two-dimensional (2D) semiconducting transition-metal dichalcogenides, could lead to nontrivial superconductivity and other unprecedented phenomena yet to be studied. In this work, superconducting α-phase thin molybdenum carbide flakes were first synthesized, and a subsequent sulfurization treatment induced the formation of vertical heterolayer systems consisting of different phases of molybdenum carbide-ranging from α to γ' and γ phases-in conjunction with molybdenum sulfide layers. These transition-metal carbide/disulfide heterostructures exhibited critical superconducting temperatures as high as 6 K, higher than that of the starting single-phased α-Mo₂C (4 K). We analyzed possible interface configurations to expl

SUBMITTER: Zhang F 

PROVIDER: S-EPMC7443864 | biostudies-literature | 2020 Aug

REPOSITORIES: biostudies-literature