2D superconductivity and vortex dynamics in 1T-MoS2

• Published in: Communications physics Vol. 1; no. 1
• Main Authors: Sharma, Chithra H., Surendran, Ananthu P., Varma, Sangeeth S., Thalakulam, Madhu
• Format: Journal Article
• Language: English
• Published: London Nature Publishing Group UK 07.12.2018; Nature Publishing Group
• Subjects: 639/301/1005/1007; 639/766/119/1003; 639/766/119/2795; Anisotropy; Electrical resistivity; Molybdenum disulfide; Phase transitions; Physics; Physics and Astronomy; Superconductivity; Transition temperature; Vortices
• ISSN: 2399-3650; 2399-3650
• DOI: 10.1038/s42005-018-0091-7

The Berezinskii-Kosterlitz-Thouless phase transition and Bose metal phase, driven by vortices and their dynamics are the hallmark features of a clean two-dimensional superconductor. Materials with a minimal structural disorder and high conductivity are essential for the observation of these features. 1T-MoS 2 , a relatively unexplored metallic van der Waals material, is a promising candidate in this regard. Here, we report the observation of two-dimensional superconductivity in a few-layer 1T-MoS 2 device. The electrical characterisation reveals a transition temperature T c ~920 mK. Berezinskii-Kosterlitz-Thouless transition and anisotropy in the magneto-transport confirm the dimensionality of the superconductivity. In addition, we observe an enhancement in the parallel upper-critical-field and emergence of the Bose metal state in our sample. The observation of 2D superconductivity in 1T-MoS 2 and the capability to scalably engineer this phase on the semiconducting 2H-MoS 2 phase opens up a new route for the realisation and study of monolithic hybrid quantum circuits. Omnipresent vortices and their dynamics enrich clean two-dimensional superconducting systems with striking features. The authors experimentally investigate the Berezinskii-Kosterlitz-Thouless transition and the Bose metal phase in 1T-MoS 2 .