Amplitude `Higgs' mode in 2H-NbSe2 Superconductor

Abstract

We report experimental evidences for the observation of the superconducting amplitude mode, so-called `Higgs' mode in the charge density wave superconductor 2H-NbSe2 using Raman scattering. By comparing 2H-NbSe2 and its iso-structural partner 2H-NbS2 which shows superconductivity but lacks the charge density wave order, we demonstrate that the superconducting mode in 2H-NbSe2 owes its spectral weight to the presence of the coexisting charge density wave order. In addition, temperature dependent measurements in 2H-NbSe2 show a full spectral weight transfer from the charge density wave mode to the superconducting mode upon entering the superconducting phase. Both observations are fully consistent with a superconducting amplitude mode or Higgs mode.

Accepted for publication in Phys. Rev. B Rapid Com. 5 pages with 3 figures

References in corpus (6)

• Inelastic Light Scattering From Correlated Electrons
• The `Higgs' Amplitude Mode at the Two-Dimensional Superfluid-Mott Insulator Transition
• Quantum Magnets under Pressure: Controlling Elementary Excitations in TlCuCl3
• Superconducting density of states and vortex cores of 2H-NbS2
• Two energy gaps and Fermi surface 'arcs' in NbSe2
• Intrinsic atomic scale modulations of the superconducting gap of 2H-NbSe2

Cited by in corpus (103)

• Ultrafast optical spectroscopy of strongly correlated materials and high-temperature superconductors: a non-equilibrium approach
• Amplitude / Higgs Modes in Condensed Matter Physics
• Higgs Mode in Superconductors
• Monitoring and manipulating Higgs and Goldstone modes in a supersolid quantum gas
• Theory of Anderson pseudospin resonance with Higgs mode in superconductors
• Non-linear optical effects and third-harmonic generation in superconductors: Cooper-pairs vs Higgs mode contribution
• Tuning Inelastic Light Scattering via Symmetry Control in 2D Magnet CrI${}_3$
• Higgs mode in the d-wave superconductor Bi2Sr2CaCu2O8+x driven by an intense terahertz pulse
• Using controlled disorder to probe the interplay between charge order and superconductivity in NbSe2
• Coupling of Higgs and Leggett modes in nonequilibrium superconductors
• Polarization-resolved terahertz third-harmonic generation in a superconductor NbN: dominance of Higgs mode beyond the BCS approximation
• Direct observation of Higgs mode oscillations in the pump-probe photoemission spectra of electron-phonon mediated superconductors
• Classification and characterization of nonequilibrium Higgs modes in unconventional superconductors
• Pressure induced collapse of the charge density wave and Higgs mode visibility in 2H-TaS${}_2$
• Nature and Raman signatures of the Higgs amplitude mode in the coexisting superconducting and charge-density-wave state
• Nonlinear optical response of collective modes in multiband superconductors assisted by nonmagnetic impurities
• Infrared activation of the Higgs mode by supercurrent injection in superconducting NbN
• Higgs-mode radiance and charge-density-wave order in 2H-NbSe${}_2$
• Theory of light-induced resonances with collective Higgs and Leggett modes in multiband superconductors
• Superconductivity and Charge Density Wave in ZrTe${}_{3-x}$Se${}_x$
• Nonlinear light-Higgs coupling in superconductors beyond BCS: Effects of the retarded phonon-mediated interaction
• Collective Modes in Excitonic Insulators: Effects of Electron-Phonon Coupling and Signatures in Optical Response
• Theory of coherent oscillations detection in THz pump-probe spectroscopy: from phonons to electronic collective modes
• Parametric excitation of an optically silent Goldstone-like phonon mode
• Higgs-mediated optical amplification in a non-equilibrium superconductor
• A balancing act: Evidence for a strong subdominant d-wave pairing channel in $\mathrm{B}{\mathrm{a}}_{0.6}{\mathrm{K}}_{0.4}\mathrm{F}{\mathrm{e}}_2\mathrm{A}{\mathrm{s}}_2$
• Multiple amplitude modes in strongly-coupled phonon-mediated superconductors
• Higgs-mode resonance in third harmonic generation in NbN superconductors: multiband electron-phonon coupling, impurity scattering, and polarization-angle dependence
• Observation of superconducting collective modes from competing pairing instabilities in single-layer NbSe${}_2$
• Pair-Breaking Collective Branch in BCS Superconductors and Superfluid Fermi Gases
• Non-equilibrium phenomena in superconductors probed by femtosecond time-domain spectroscopy
• Superconducting fluctuations probed by the Higgs mode in Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+x}$ thin films
• Theory of driven Higgs oscillations and third-harmonic generation in unconventional superconductors
• Revealing novel aspects of light-matter coupling in terahertz two-dimensional coherent spectroscopy: the case of the amplitude mode in superconductors
• Few-body precursor of the Higgs mode in a superfluid Fermi gas
• Persistent oscillations of the order parameter and interaction quench phase diagram for a confined Bardeen-Cooper-Schrieffer Fermi gas
• Amplitude mode oscillations in pump-probe photoemission spectra from a d-wave superconductor
• A long-lived Higgs mode in a two-dimensional confined Fermi gas
• Dynamics of Order Parameters near Stationary States in Superconductors with a Charge-Density Wave
• Higgs Mode and Magnon Interactions in 2D Quantum Antiferromagnets from Raman Scattering
• Optical response of the Leggett mode in multiband superconductors in the linear response regime
• Higgs Oscillations in time-resolved Optical Conductivity
• Transient Higgs oscillations and high-order nonlinear light-Higgs coupling in terahertz-wave drivenNbN superconductor
• Damping of the Collective Amplitude Mode in Superconductors with Strong Electron-Phonon Coupling
• Higgs Modes in the Pair Density Wave Superconducting State
• Nontrivial Metallic State of Molybdenum Disulfide
• Fano resonance through Higgs bound states in tunneling of Nambu-Goldstone modes
• Van Vleck excitons in Ca${}_2$RuO${}_4$
• Following the Higgs mode across the BCS-BEC crossover in two dimensions
• Evidence of a distinct collective mode in Kagome superconductors
• Damping of the Higgs and Nambu-Goldstone modes of superfluid Bose gases at finite temperatures
• Phase signatures in third-harmonic response of Higgs and coexisting modes in superconductors
• First-principles calculations of double resonance Raman spectra for monolayer MoTe${}_2$
• Hidden charge-conjugation, parity, and time-reversal symmetries and massive Goldstone (Higgs) modes in superconductors
• Fluctuations and pairing in Fe-based superconductors: Light scattering experiments
• Charge-Density-Wave Order in 2H-NbSe${}_2$
• Classification of Lifshitz invariant in multiband superconductors: an application to Leggett modes in the linear response regime in Kagome lattice models
• Two-particle spectral function for disordered s-wave superconductors: local maps and collective modes
• Coexistence of superconductivity and density wave in $\mathrm{B}{\mathrm{a}}_2\mathrm{T}{\mathrm{i}}_2\mathrm{F}{\mathrm{e}}_2\mathrm{A}{\mathrm{s}}_4\mathrm{O}$: an optical spectroscopy study
• Calculation of an enhanced A1g symmetry mode induced by Higgs oscillations in the Raman spectrum of high-temperature cuprate superconductors
• Observation of anomalous amplitude modes in the kagome metal CsV${}_3$Sb${}_5$
• Excitation of the Higgs Mode in a Superfluid Fermi Gas in the BCS-BEC Crossover
• Higgs modes in proximized superconducting systems
• Floquet engineering Higgs dynamics in time-periodic superconductors
• Unveiling resilient superconducting fluctuations in atomically thin NbSe${}_2$ through Higgs mode spectroscopy
• Superconductivity, Broken Gauge Symmetry, and the Higgs Mechanism
• Lifshitz transition enabling superconducting dome around the quantum critical point in TiSe${}_2$
• Higgs modes in two-dimensional spatially-indirect exciton condensates
• Direct observation of the Higgs particle in a superconductor by non-equilibrium Raman scattering
• Dispersion of plasmons in three-dimensional superconductors
• Response of the Higgs amplitude mode of superfluid Bose gases in a three dimensional optical lattice
• On the Excitations of a Balian-Werthamer Superconductor
• Long-lived Higgs modes in strongly correlated condensates
• Collective magnetic Higgs excitation in a pyrochlore ruthenate
• Optically active Higgs and Leggett modes in multiband pair-density-wave superconductors with Lifshitz invariant
• Dynamical instability towards finite-momentum pairing in quenched BCS superconducting phases
• Thermal effects on collective modes in disordered $s$-wave superconductors
• Proximity-induced collective modes in an unconventional superconductor heterostructure
• Unconventional photo-induced charge-density-wave dynamics in 2H-NbSe${}_2$
• Coupling the Higgs mode and ferromagnetic resonance in spin-split superconductors with Rashba spin-orbit coupling
• Collective excitations in competing phases in two and three dimensions
• Collective modes in superconductors including Coulomb repulsion
• Localized Higgs modes of superfluid Bose gases in optical lattices: A Guzwiller mean-field study
• Incoherent Excitation of Coherent Higgs Oscillations in Superconductors
• Reducing the frequency of the Higgs mode in a helical superconductor coupled to an LC-circuit
• Time-resolved optical conductivity and Higgs oscillations in two-band dirty superconductors
• Hybridization of the amplitude mode in a confined fermionic superfluid
• Spatially resolved collective modes in d-wave superconductors
• Higgs physics in superconductors
• Two-dimensional coherent spectroscopy of disordered superconductors in the narrow-band and broad-band limits
• Terahertz pulse-driven collective mode in the nematic superconducting state of Ba${}_{1-x}$K${}_x$Fe${}_2$As${}_2$
• Bragg spectroscopy and pair-breaking-continuum mode in a superfluid Fermi gas
• Amplitude mode at the superfluid-insulator transition on a random lattice
• Linear response of a superfluid Fermi gas inside its pair-breaking continuum
• Higgs mode stabilization by photo-induced long-range interactions in a superconductor
• AC Josephson Signatures of the Superconducting Higgs Mode
• Amplitude mode of charge density wave in TTF[Ni(dmit)2]2 observed by electronic Raman scattering
• Raman response of collective modes in multicomponent superconductors
• Quasiparticle disintegration in fermionic superfluids
• Higgs and Nambu-Goldstone modes in a spin-1 $XY$ model with long-range interactions
• Third-harmonic generation in superconductors: Role of quantum geometry in the competition between Higgs mode and quasiparticles
• Observation of Quantum-Criticality-Class Crossover at the LaAlO${}_3$/KTaO${}_3$ (111) Interface
• Higgs oscillations in a unitary Fermi superfluid