Enhanced Superconductivity and Suppression of Charge-density Wave Order in 2H-TaS${}_2$ in the Two-dimensional Limit

Abstract

As superconductors are thinned down to the 2D limit, their critical temperature $T_c$ typically decreases. Here we report the opposite behavior, a substantial enhancement of $T_c$ with decreasing thickness, in 2D crystalline superconductor 2H-TaS${}_2$. Remarkably, in the monolayer limit, $T_c$ increases to 3.4 K compared to 0.8 K in the bulk. Accompanying this trend in superconductivity, we observe suppression of the charge-density wave (CDW) transition with decreasing thickness. To explain these trends, we perform electronic structure calculations showing that a reduction of the CDW amplitude results in a substantial increase of the density of states at the Fermi energy, which contributes to the enhancement of $T_c$. Our results establish ultra-thin 2H-TaS${}_2$ as an ideal platform to study the competition between CDW order and superconductivity.

References in corpus (31)

• Wannier90: A Tool for Obtaining Maximally-Localised Wannier Functions
• Maximally localized Wannier functions: Theory and applications
• Evidence of Ising pairing in superconducting NbSe${}_2$ atomic layers
• Two Dimensional Ising Superconductivity in Gated MoS${}_2$
• Strongly enhanced charge-density-wave order in monolayer NbSe${}_2$
• Characterization of collective ground states in single-layer NbSe2
• Superconductivity protected by spin-valley locking in ion-gated MoS2
• Highly crystalline 2D superconductors
• CDW, Superconductivity and Anomalous Metallic Behavior in 2D Transition Metal Dichalcogenides
• Quality heterostructures from two dimensional crystals unstable in air by their assembly in inert atmosphere
• Tuning Ising superconductivity with layer and spin-orbit coupling in two-dimensional transition-metal dichalcogenides
• Enhanced superconductivity in atomically thin TaS2
• Unfolding first-principles band structures
• Resistivity as a function of temperature for models with hot spots on the Fermi surface.
• Nature of the Quantum Metal in a Two-Dimensional Crystalline Superconductor
• Interplay of disorder and spin fluctuations in the resistivity near a quantum critical point
• Unified explanation of the Kadowaki-Woods ratio in strongly correlated materials
• Effect of dimensionality on the charge-density-wave in few-layers 2H-NbSe${}_2$
• Tuning the Charge Density Wave and Superconductivity in CuxTaS2
• Strong enhancement of superconductivity at high pressures within the charge-density-wave states of 2H-TaS 2 and 2H-TaSe 2
• Unusual suppression of the superconducting energy gap and critical temperature in atomically thin NbSe2
• Upper critical field in dirty two-band superconductors: breakdown of the anisotropic Ginzburg-Landau theory
• Crystalline and electronic structure of single-layer TaS${}_2$
• Unfolding the band structure of disordered solids: from bound states to high-mobility Kane fermions
• One-Fe versus Two-Fe Brillouin Zone of Fe-Based Superconductors: Creation of the Electron Pockets via Translational Symmetry Breaking
• Chiral charge order in the superconductor 2H-TaS2
• Charge Order in NbSe${}_2$
• Effect of doping on lattice instabilities of single-layer 1H-TaS2
• Enhancement of superconductivity at the onset of charge-density-wave order in a metal
• Coherence length in superconductors from weak to strong coupling
• Projection operator approach to unfolding supercell band structures

Cited by in corpus (56)

• Hydrogen-induced high-temperature superconductivity in two-dimensional materials: Example of hydrogenated monolayer MgB${}_2$
• Clean 2D superconductivity in a bulk van der Waals superlattice
• Patterns and driving forces of dimensionality-dependent charge density waves in 2H-type transition metal dichalcogenides
• Quantum enhancement of charge density wave in NbS${}_2$ in the 2D limit
• Gate-Tunable Reversible Rashba-Edelstein Effect in a Few-Layer Graphene/2H-TaS2 Heterostructure at Room Temperature
• Weak Dimensionality Dependence and Dominant Role of Ionic Fluctuations in the Charge-Density-Wave Transition of NbSe${}_2$
• Charge density wave instability and pressure-induced superconductivity in bulk 1T-NbS2
• Alternating superconducting and charge density wave monolayers within bulk 6R-TaS2
• Superconductivity, Charge-Density-Waves, and Bipolarons in the Holstein model
• Enhanced superconductivity in few-layer TaS${}_2$ due to healing by oxygenation
• Ultra-Narrow TaS2 Nanoribbons
• Superconductivity in monolayer Ba${}_2$N electride: a first-principles study
• Intrinsic first and higher-order topological superconductivity in a doped topological insulator
• Two-dimensional charge density wave TaX${}_2$ (X=S, Se, Te) from first principles
• Anomalous thickness-dependent electrical conductivity in van der Waals layered transition metal halide, Nb_3Cl_8
• Phonon Self-Energy Corrections: To Screen, or Not to Screen
• Evidence of nodal superconductivity in monolayer 1H-TaS${}_2$ with hidden order fluctuations
• Substrate-induced suppression of charge density wave in monolayer 1H-TaS2 on Au(111)
• Electron-phonon coupling in a honeycomb borophene grown on Al(111) surface
• Weyl nodal line induced pairing in Ising superconductor and high critical field
• Observation of Two-dimensional Superconductivity in an Ultrathin Iron-Arsenic Superconductor
• Unusual evolution of B_{c2} and T_c with inclined fields in restacked TaS_2 nanosheets
• Superconducting dome by tuning through a Van Hove singularity in a two-dimensional metal
• Robust Gapless Superconductivity in 4Hb-TaS${}_2$
• Dynamical vortex phase diagram of 2D superconductivity in gated MoS2
• Topological Ising pairing states in monolayer and trilayer TaS${}_2$
• Proximity induced spin-orbit splitting in graphene nanoribbons on transition metal dichalcogenides
• Extreme orbital ab-plane upper critical fields far beyond Pauli limit in 4Hb-Ta(S, Se)2 bulk crystals
• A mechanism for $\pi$ phase shifts in Little-Parks experiments: application to 4Hb-TaS${}_2$ and to 2H-TaS${}_2$ intercalated with chiral molecules
• The field theory of a superconductor with repulsion
• Enhanced Superconductivity in Monolayer $T_d$-MoTe${}_2$ with Tilted Ising Spin Texture
• Signature of Orbital Driven Finite Momentum Pairing in a 3D Ising Superconductor
• Enhanced Superconductivity in 2H-TaS2 Devices Through in-situ Molecular Intercalation
• Emergent charge density wave featuring quasi-one-dimensional chains in Ta-intercalated bilayer 2$H$-TaS${}_2$ with coexisting superconductivity
• Enhancement of the superconductivity and quantum metallic state in the thin film of superconducting Kagome metal KV${}_3$Sb${}_5$
• A Theoretical Investigation of Charge Density Wave Instability in CuS${}_2$
• Nonlinear optical responses in multi-orbital topological superconductors
• Darkness in interlayer and charge density wave states of 2H-TaS2
• Slow, Nanometer Light Confinement Observed in Atomically Thin TaS2
• Engineering chiral topological superconductivity in twisted Ising superconductors
• Probing enhanced superconductivity in van der Waals polytypes of V${}_x$TaS${}_2$
• Reciprocal and nonreciprocal paraconductivity in bilayer multiphase superconductors
• Resistive anisotropy in the charge density wave phase of Kagome superconductor CsV3Sb5 thin films
• Origin of subgap states in normal-insulator-superconductor van der Waals heterostructures
• Periodicity of superconducting shape resonances in thin films
• Galvanic intercalation of molecular cations into van der Waals materials
• Superconducting Sn-Intercalated TaSe${}_2$: Structural Diversity Obscured by Routine Characterization Techniques
• Spin-Valley Locking in 2H-TaS2 and Its Co-Intercalated Counterpart: Roles of Surface Domains and Co Intercalation
• Nested Fermi surfaces and correlated electronic phases in hole-doped semiconductor quantum wells
• Systematic study of superconductivity in few-layer $T_d$-MoTe${}_2$
• Emergent 3D Fermiology and Magnetism in an Intercalated Van der Waals System
• Pressure-induced reentrant superconductivity in a misfit layered compound $(\mathrm{SnS}{)}_{1.15}(\mathrm{Ta}{\mathrm{S}}_2)$
• The attractive Hubbard model as an $SO(3)$ system of competing phases: supersolid order and its thermal melting
• Pair-mixing induced Time-reversal-breaking superconductivity
• Modulation of superconductivity by quantum confinement in doped strontium titanate
• Discovery of Van Hove Singularities: Electronic Fingerprints of 3Q Magnetic Order in a van der Waals Quantum Magnet