Clean 2D superconductivity in a bulk van der Waals superlattice

Abstract

Advances in low-dimensional superconductivity are often realized through improvements in material quality. Apart from a small group of organic materials, there is a near absence of clean-limit two-dimensional (2D) superconductors, which presents an impediment to the pursuit of numerous long-standing predictions for exotic superconductivity with fragile pairing symmetries. Here, we report the development of a bulk superlattice consisting of the transition metal dichalcogenide (TMD) superconductor 2$H$-niobium disulfide (2$H$-NbS${}_2$) and a commensurate block layer that yields dramatically enhanced two-dimensionality, high electronic quality, and clean-limit inorganic 2D superconductivity. The structure of this material may naturally be extended to generate a distinct family of 2D superconductors, topological insulators, and excitonic systems based on TMDs with improved material properties.

arXiv commentAccepted version with revised title, discussion, structure, and figures. 38 pages, 4 figures

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Cited by in corpus (17)

• Supercurrent diode effect and finite momentum superconductivity
• Clean 2D superconductivity in a bulk van der Waals superlattice
• Orbital Fulde-Ferrell-Larkin-Ovchinnikov state in an Ising superconductor
• Superconductivity and Local Inversion-Symmetry Breaking
• Topological metals and finite-momentum superconductors
• Intrinsic first and higher-order topological superconductivity in a doped topological insulator
• Striped electronic phases in an incommensurately modulated van der Waals superlattice
• Weyl nodal line induced pairing in Ising superconductor and high critical field
• Probing the interlayer coupling in 2$H$-NbS${}_2$ via soft x-ray angle-resolved photoemission spectroscopy
• Observation of orbital order in the Van der Waals material 1T-TiSe2
• Phase diagram of superconducting vortex ratchet motion in a superlattice with noncentrosymmetry
• Flux-flow instability across Berezinskii Kosterlitz Thouless phase transition in KTaO${}_3$ (111) based superconductor
• A revisit of superconductivity in 4$H_b$-TaS${}_{2-2x}$Se${}_{2x}$ single crystals
• Mechanical control of physical properties in the van der Waals ferromagnet Cr2Ge2Te6 via application of electric current
• Tuning metal/superconductor to insulator/superconductor coupling via control of proximity enhancement between NbSe${}_2$ monolayers
• Negative differential resistance state in the free-flux-flow regime of driven vortices in a single crystal of 2H-NbS${}_2$
• A Chiral Superlattice Route to Spin-Split Topological Antiferromagnetism