Percolating Superconductivity in Air-Stable Organic-Ion Intercalated MoS2

Abstract

When doped into a certain range of charge carrier concentrations, MoS2 departs from its pristine semiconducting character to become a strongly correlated material characterized by exotic phenomena such as charge density waves or superconductivity. However, the required doping levels are typically achieved using ionic-liquid gating or air-sensitive alkali-ion intercalation, which are not compatible with standard device fabrication processes. Here, we report on the emergence of superconductivity and a charge density wave phase in air-stable organic cation intercalated MoS2 crystals. By selecting two different molecular guests, we show that these correlated electronic phases depend dramatically on the intercalated cation, demonstrating the potential of organic ion intercalation to finely tune the properties of 2D materials. Moreover, we find that a fully developed zero-resistance state is not reached in few-nm-thick flakes, indicating the presence of three-dimensional superconductive paths which are severed by the mechanical exfoliation. We ascribe this behavior to an inhomogeneous charge carrier distribution, which we probe at the nanoscale using scanning near-field optical microscopy. Our results establish organic-ion intercalated MoS2 as a platform to study the emergence and modulation of correlated electronic phases.

References in corpus (18)

• Atomically thin MoS2: A new direct-gap semiconductor
• Evidence of Ising pairing in superconducting NbSe${}_2$ atomic layers
• Superconductivity in Cu_xTiSe_2
• Strongly enhanced charge-density-wave order in monolayer NbSe${}_2$
• Gate-tunable Phase Transitions in 1T-TaS${}_2$
• Characterization of collective ground states in single-layer NbSe2
• Superconductivity protected by spin-valley locking in ion-gated MoS2
• Enhanced superconductivity in atomically thin TaS2
• Gate-induced Superconductivity in atomically thin MoS2 crystals
• Absence of ferromagnetism in VSe${}_2$ caused by its charge density wave phase
• Probes for Ultrasensitive THz Nanoscopy
• Hexagonal Boron Nitride (hBN) as a Low-loss Dielectric for Superconducting Quantum Circuits and Qubits
• Dielectric Property of MoS2 Crystal in Terahertz and Visible Region
• Miniaturizing transmon qubits using van der Waals materials
• Charge density waves in electron-doped molybdenum disulfide
• Tailoring Superconductivity in Large-Area Single-Layer NbSe2 via Self-Assembled Molecular Adlayers
• Interplay of charge density waves, disorder, and superconductivity in 2$H$-TaSe${}_2$ elucidated by NMR
• Anomalous metallic phase in molybdenum disulphide induced via gate-driven organic ion intercalation

Cited by in corpus (4)

• Ionic liquid gating induced self-intercalation of transition metal chalcogenides
• Tunable magnetism in 2D organic-ion-intercalated MnPS3 via molecule-dependent vacancy generation
• Enhanced Superconductivity in 2H-TaS2 Devices Through in-situ Molecular Intercalation
• Galvanic intercalation of molecular cations into van der Waals materials