Competing Coulomb and electron-phonon interactions in NbS${}_2$

Abstract

The interplay of Coulomb and electron-phonon interactions with thermal and quantum fluctuations facilitates rich phase diagrams in two-dimensional electron systems. Layered transition metal dichalcogenides hosting charge, excitonic, spin and superconducting order form an epitomic material class in this respect. Theoretical studies of materials like NbS${}_2$ have focused on the electron-phonon coupling whereas the Coulomb interaction, particularly strong in the monolayer limit, remained essentially untouched. Here, we analyze the interplay of short- and long-range Coulomb as well as electron-phonon interactions in NbS${}_2$ monolayers. The combination of these interactions causes electronic correlations that are fundamentally different to what would be expected from the interaction terms separately. The fully interacting electronic spectral function resembles the non-interacting band structure but with appreciable broadening. An unexpected coexistence of strong charge and spin fluctuations puts NbS${}_2$ close to spin and charge order, suggesting monolayer NbS${}_2$ as a platform for atomic scale engineering of electronic quantum phases.

References in corpus (56)

• Quantum ESPRESSO: a modular and open-source software project for quantum simulations of materials
• The electronic properties of graphene
• Two Dimensional Atomic Crystals
• Van der Waals heterostructures
• Phonons and related properties of extended systems from density-functional perturbation theory
• Resonant Inelastic X-ray Scattering Studies of Elementary Excitations
• Strongly enhanced charge-density-wave order in monolayer NbSe${}_2$
• Strong electronic correlations from Hund's coupling
• Frequency-dependent local interactions and low-energy effective models from electronic structure calculations
• Kinetic frustration and the nature of the magnetic and paramagnetic states in iron pnictides and iron chalcogenides
• Gate-tunable Phase Transitions in 1T-TaS${}_2$
• Characterization of collective ground states in single-layer NbSe2
• Dielectric screening in two-dimensional insulators: Implications for excitonic and impurity states in graphane
• The ALPS project release 2.0: Open source software for strongly correlated systems
• Coherence-incoherence crossover in the normal state of iron-oxypnictides and importance of the Hund's rule coupling
• Superconductivity of bulk CaC6
• Screening and Many-Body Effects in Two-Dimensional Crystals: Monolayer MoS${}_2$
• Janus-faced influence of the Hund's rule coupling in strongly correlated materials
• A metallic mosaic phase and the origin of Mott insulating state in 1T-TaS2
• Spin freezing transition and non-Fermi-liquid self-energy in a 3-orbital model
• Optimal Hubbard models for materials with nonlocal Coulomb interactions: graphene, silicene and benzene
• Nanoscale manipulation of the Mott insulating state coupled to charge order in 1T-TaS2
• Effect of dimensionality on the charge-density-wave in few-layers 2H-NbSe${}_2$
• Superconducting density of states and vortex cores of 2H-NbS2
• The dielectric genome of van der Waals heterostructures
• Long range coherent magnetic bound states in superconductors
• Efficient implementation of the GW approximation within the all-electron FLAPW method
• Efficient DMFT-simulation of the Holstein-Hubbard Model
• Emergence of coherence in the charge-density wave state of 2H-NbSe${}_2$
• Origin of superconductivity and latent charge density wave in NbS${}_2$
• Dual boson approach to collective excitations in correlated fermionic systems
• Coupled Yu-Shiba-Rusinov states in molecular dimers on NbSe${}_2$
• Strong anharmonicity induces quantum melting of charge density wave in 2H-NbSe$\_2$ under pressure
• Long-range Coulomb interactions in surface systems: a first principles description within self-consistently combined GW and dynamical mean field theory
• Electron-phonon Interaction close to a Mott transition
• Beyond extended dynamical mean-field theory: Dual boson approach to the two-dimensional extended Hubbard model
• Charge Order from Orbital-dependent Coupling Evidenced by NbSe${}_2$
• Crystalline and electronic structure of single-layer TaS${}_2$
• Wannier Function Approach to Realistic Coulomb Interactions in Layered Materials and Heterostructures
• Anharmonic suppression of Charge density wave in 2H-NbS${}_2$
• Electronic correlations in monolayer VS${}_2$
• Pressure dependence of superconducting critical temperature and upper critical field of 2H-NbS2
• Plasmons in strongly correlated systems: spectral weight transfer and renormalized dispersion
• Phase Diagram of Electron Doped Dichalcogenides
• Measurement of the dynamic charge response of materials using low-energy, momentum-resolved electron energy-loss spectroscopy (M-EELS)
• Efficient implementation of the continuous-time hybridization expansion quantum impurity solver
• Interplay of electron-electron and electron-phonon interactions in the low temperature phase of 1T-TaS2
• Collective Charge Excitations of Strongly Correlated Electrons, Vertex Corrections and Gauge Invariance
• Self-energy and vertex functions from hybridization expansion continuous-time quantum Monte Carlo for impurity models with retarded interaction
• Dynamical mean-field theory of Hubbard-Holstein model at half-filling: Zero temperature metal-insulator and insulator-insulator transitions
• Charge Order in NbSe${}_2$
• Efficient calculation of the Coulomb matrix and its expansion around k=0 within the FLAPW method
• Valley Plasmonics in the Dichalcogenides
• Spin density wave instabilities in the NbS2 monolayer
• Interplay of screening and superconductivity in low-dimensional materials
• Charge Ordering Geometries in Uniaxially-Strained NbSe${}_2$

Cited by in corpus (23)

• Patterns and driving forces of dimensionality-dependent charge density waves in 2H-type transition metal dichalcogenides
• Discovery of a Single-Band Mott Insulator in a van der Waals Flat-Band Compound
• Dual Boson Diagrammatic Monte Carlo Approach Applied to the Extended Hubbard Model
• Random Phase Approximation for gapped systems: role of vertex corrections and applicability of the constrained random phase approximation
• Epitaxial single layer NbS${}_2$ on Au(111): synthesis, structure, and electronic properties
• Nonconventional screening of Coulomb interaction in two-dimensional semiconductors and metals: A comprehensive cRPA study of MX2 (M=Mo, W, Nb, Ta; X=S, Se, Te)
• Effective Ising model for correlated systems with charge ordering
• Optically induced topological superconductivity via Floquet interaction engineering
• Rigorous screened interactions for realistic correlated electron systems
• Unconventional charge-density-wave gap in monolayer NbS${}_2$
• Combining Electron-Phonon and Dynamical Mean-Field Theory Calculations of Correlated Materials: Transport in the Correlated Metal Sr${}_2$RuO${}_4$
• Superconducting Chevrel phase PbMo${}_6$S${}_8$ from first principles
• Collective magnetic fluctuations in Hubbard plaquettes captured by fluctuating local field method
• Effects of Nb Doping on the Charge-Density Wave and Electronic Correlations in the Kagome Metal Cs(V${}_{1-x}$Nb${}_x$)${}_3$Sb${}_5$
• Electronic Correlations and Evolution of the Charge-Density Wave in the Kagome Metals $A$V${}_3$Sb${}_5$ ($A$ = K, Rb, Cs)
• Probing the interlayer coupling in 2$H$-NbS${}_2$ via soft x-ray angle-resolved photoemission spectroscopy
• Coexistence of the Kondo effect and spin glass physics in Fe-doped NbS${}_2$
• Strong In-plane Anisotropy in the Electronic Properties of Doped Transition Metal Dichalcogenides exhibited in W1-xNbxS2
• Darkness in interlayer and charge density wave states of 2H-TaS2
• Charge instabilities of the extended attractive Hubbard Model on the cubic lattice
• Local bottom-up effective theory of non-local electronic interactions
• Charge Density Waves beyond the Pauli paramagnetic limit in 2D systems
• Downfolding the Su-Schrieffer-Heeger model