High-order nonlinear terahertz probing of the two-band superconductor MgB${}_2$: Third- and fifth-order harmonic generation

Abstract

We report on high-order harmonic generation in the two-band superconductor MgB${}_2$ driven by intense terahertz electromagnetic pulses. Third- and fifth-order harmonics are resolved in time domain and investigated as a function of temperature and in applied magnetic fields crossing the superconducting phase boundary. The high-order harmonics in the superconducting phase reflects nonequilibrium dynamics of the superconducting order parameter in MgB${}_2$, which is probed via nonlinear coupling to the terahertz field. The observed temperature and field dependence of the nonlinear response allows to establish the superconducting phase diagram.

arXiv comment9 pages, 5 figures

References in corpus (47)

• Superconductivity of metallic boron in MgB_2
• Sub-cycle control of terahertz high-harmonic generation by dynamical Bloch oscillations
• Evidence for two superconducting energy gaps in MgB2 by point-contact spectroscopy
• Generation of phase-matched circularly-polarized extreme ultraviolet high harmonics for magnetic circular dichroism spectroscopy
• Amplitude / Higgs Modes in Condensed Matter Physics
• Two-Band Superconductivity in MgB2
• Impact of the electronic band structure in high-harmonic generation spectra of solids
• Vortex Imaging in the pi-Band of Magnesium Diboride
• Broadband, electrically tuneable, third harmonic generation in graphene
• High harmonic imaging of ultrafast many-body dynamics in strongly correlated systems
• Higgs Mode in Superconductors
• The Nonlinear Meissner Effect in Unconventional Superconductors
• Non-linear optical effects and third-harmonic generation in superconductors: Cooper-pairs vs Higgs mode contribution
• Anisotropic superconducting properties of MgB2 single crystals probed by in-plane electrical transport measurements
• Efficient Terahertz Harmonic Generation with Coherent Acceleration of Electrons in the Dirac Semimetal Cd3As2
• Pair-breaking and superconducting state recovery dynamics in MgB2
• Phase-resolved Higgs response in superconducting cuprates
• Far-infrared optical conductivity gap in superconducting MgB2 films
• Mixed state of a dirty two-band superconductor: application to MgB_2
• Non-perturbative high-harmonic generation in the three-dimensional Dirac semimetal Cd${}_3$As${}_2$
• Nonlinear electromagnetic response and Higgs mode excitation in BCS superconductors with impurities
• Discovery of Terahertz Second Harmonic Generation from Lightwave Acceleration of Symmetry--Breaking Nonlinear Supercurrents
• Probing optically silent superfluid stripes in cuprates
• Theoretical description of high-order harmonic generation in solids
• Optical conductivity and penetration depth in MgB2
• Nonlinear optical response of collective modes in multiband superconductors assisted by nonmagnetic impurities
• Nonreciprocal Terahertz Second Harmonic Generation in Superconducting NbN under Supercurrent Injection
• High-order Harmonic Generation and its Unconventional Scaling Law in the Mott-insulating $\mathrm{C}{\mathrm{a}}_2\mathrm{Ru}{\mathrm{O}}_4$
• Third harmonic generation from collective modes in disordered superconductors
• The two colors of MgB2
• High-harmonic generation approaching the quantum critical point of strongly correlated systems
• Time-resolved dynamics of the superconducting two-gap state in MgB2 thin films
• Nonlinear light-Higgs coupling in superconductors beyond BCS: Effects of the retarded phonon-mediated interaction
• High-harmonic generation in quantum spin systems
• Ultrafast Hot Phonon Dynamics in MgB${}_2$ Driven by Anisotropic Electron-Phonon Coupling
• Theory of driven Higgs oscillations and third-harmonic generation in unconventional superconductors
• Band-selective third-harmonic generation in superconducting MgB${}_2$: Possible evidence for Higgs amplitude mode in the dirty limit
• Quasiclassical Theory on Third-Harmonic Generation in Conventional Superconductors with Paramagnetic Impurities
• Nonperturbative Topological Current in Weyl and Dirac Semimetals in Laser Fields
• Nonlinear microwave response of MgB2
• Real-time Observation of Phonon-Mediated $\sigma$-$\pi$ Interband Scattering in MgB2
• Metastable Vortex Lattice Phases in Superconducting MgB2
• Two-band parallel conductivity at terahertz frequencies in the superconducting state of MgB${}_2$.
• Ellipticity control of terahertz high-harmonic generation in a Dirac semimetal
• Transient Higgs oscillations and high-order nonlinear light-Higgs coupling in terahertz-wave drivenNbN superconductor
• Contribution of Collective Excitations to Third Harmonic Generation in Multiband Superconductors: the case of MgB${}_2$
• Study of the microwave electrodynamic response of MgB2 thin films

Cited by in corpus (12)

• Revealing novel aspects of light-matter coupling in terahertz two-dimensional coherent spectroscopy: the case of the amplitude mode in superconductors
• High-harmonic generation in semi-Dirac and Weyl semimetals with broken time-reversal symmetry: Exploring merging of Weyl nodes
• Observation of terahertz second harmonic generation from Dirac surface states in the topological insulator Bi${}_2$Se${}_3$
• Unusual Low-Energy Collective Charge Excitations in High-$T_c$ Cuprate Superconductors
• Ultrafast dynamics of optically excited charge carriers in the room-temperature antiferromagnetic semiconductor $\alpha$-MnTe
• Direct observation of the Higgs particle in a superconductor by non-equilibrium Raman scattering
• Amplitude mode in a multi-gap superconductor MgB${}_2$ investigated by terahertz two-dimensional coherent spectroscopy
• Terahertz third-harmonic generation of lightwave driven Weyl fermions far from equilibrium
• Collective modes in superconductors including Coulomb repulsion
• Optical Pumping of Bardeen-Cooper-Schrieffer Superconductors
• Two-dimensional THz spectroscopy in electronic systems: a many-body diagrammatic approach
• Anomalous terahertz nonlinearity in disordered s-wave superconductor close to the superconductor-insulator transition