Tailoring Superconductivity in Large-Area Single-Layer NbSe2 via Self-Assembled Molecular Adlayers
arXiv:2012.03838 · doi:10.1021/acs.nanolett.0c03386
Abstract
Two-dimensional transition metal dichalcogenides (TMDs) represent an ideal testbench for the search of materials by design, because their optoelectronic properties can be manipulated through surface engineering and molecular functionalization. However, the impact of molecules on intrinsic physical properties of TMDs, such as superconductivity, remains largely unexplored. In this work, the critical temperature (TC) of large-area NbSe2 monolayers is manipulated, employing ultrathin molecular adlayers. Spectroscopic evidence indicates that aligned molecular dipoles within the self-assembled layers act as a fixed gate terminal, collectively generating a macroscopic electrostatic field on NbSe2. This results in an \sim 55\% increase and a 70\% decrease in TC depending on the electric field polarity, which is controlled via molecular selection. The reported functionalization, which improves the air stability of NbSe2, is efficient, practical, up-scalable, and suited to functionalize large-area TMDs. Our results indicate the potential of hybrid 2D materials as a novel platform for tunable superconductivity.
References in corpus (17)
- Atomically thin MoS2: A new direct-gap semiconductor
- Observation of tightly bound trions in monolayer MoS2
- Gate-tunable Room-temperature Ferromagnetism in Two-dimensional FeGeTe
- Growth of Large-Area and Highly Crystalline MoS2 Thin Layers on Insulating Substrates
- Tuning the graphene work function by electric field effect
- Evidence of Ising pairing in superconducting NbSe atomic layers
- Characterization of collective ground states in single-layer NbSe2
- Quality heterostructures from two dimensional crystals unstable in air by their assembly in inert atmosphere
- Atomically thin p-n junctions based on two-dimensional materials
- Gate-tuned normal and superconducting transport at the surface of a topological insulator
- Ising Superconductivity and Quantum Phase Transition in Macro-Size Monolayer NbSe2
- Gate tuning of electronic phase transitions in two-dimensional NbSe
- Coupled Yu-Shiba-Rusinov states in molecular dimers on NbSe
- Disorder induced multifractal superconductivity in monolayer niobium dichalcogenides
- Molecular Assembly on Two-Dimensional Materials
- Observation of Coexistence of Yu-Shiba-Rusinov States and Spin-Flip Excitations
- Magnetic-Related States and Order Parameter Induced in a Conventional Superconductor by Nonmagnetic Chiral Molecules