Plasma-enhanced pulsed-laser deposition of single-crystalline Mo2C ultrathin superconducting films

Fan Zhang; Zhi Zhang; Huichao Wang; Cheuk Ho Chan; Ngai Yui Chan; Xin Xin Chen; Ji-Yan Dai

doi:10.1103/PhysRevMaterials.1.034002

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Plasma-enhanced pulsed-laser deposition of single-crystalline Mo2C ultrathin superconducting films

Fan Zhang, Zhi Zhang, Huichao Wang, Cheuk Ho Chan, Ngai Yui Chan, Xin Xin Chen, Ji-Yan Dai

DOI 10.1103/PhysRevMaterials.1.034002 · Physical Review Materials

T1

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Abstract

Transition-metal carbides (TMCs) possess many intriguing properties and inspiring application potentials, and recently the study of a two-dimensional form of TMCs has attracted great attention. Herein, we report successful fabrication of continuous Mo2C ultrathin single-crystalline films at 700∘C with an approach of plasma-enhanced pulsed-laser deposition. By sophisticated structural analyses, the Mo2C films are characterized as single crystal with a rarely reported face-centered cubic structure. In further electrical transport measurements, superconductivity observed in the Mo2C films demonstrates a typical two-dimensional feature, which is consistent with Berezinskii-Kosterlitz-Thouless transitions. Besides, large upper critical magnetic fields are discovered in this system. Our work offers an approach to grow large-area and high-quality TMCs at relatively low temperatures. This study may stimulate more related investigations on the synthesis, characterizations, and applications of two-dimensional TMCs.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Mo2C Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown