Phonon dispersion and lifetimes in MgB2

Abstract

We measure phonon dispersion and linewidth in a single crystal of MgB_2 along the Gamma-A, Gamma-M and A-L directions using inelastic X-Ray scattering. We use Density Functional Theory to compute the effect of both electron-phonon coupling and anharmonicity on the linewidth, obtaining excellent agreement with experiment. Anomalous broadening of the E_2g phonon mode is found all along Gamma-A. The dominant contribution to the linewidth is always the electron-phonon coupling.

4 pages, 3 figures

References in corpus (8)

• Giant anharmonicity and non-linear electron-phonon coupling in MgB${}_2$; A combined first-principles calculations and neutron scattering study
• First-Principles Calculation of the Superconducting Transition in MgB2 within the Anisotropic Eliashberg Formalism
• Raman spectrum and lattice parameters of MgB2 as a function of pressure
• Effect of Al doping on the optical phonon spectrum in Mg(1-x)Al(x)B(2)
• Anomalous Dispersion of Longitudinal Optical Phonons in $\mathbf{N}{\mathbf{d}}_{1.86}\mathbf{C}{\mathbf{e}}_{0.14}\mathbf{Cu}{\mathbf{O}}_{4+\mathbf{\delta }}$ Determined by Inelastic X-ray Scattering
• Phonons in MgB2 by Polarized Raman Scattering on Single Crystals
• MgB_2 under pressure: phonon calculations, Raman spectroscopy, and optical reflectance
• Small Fermi energy and phonon anharmonicity in MgB_2 and related compounds

Cited by in corpus (60)

• Electron-phonon interactions from first principles
• EPW: Electron-phonon coupling, transport and superconducting properties using maximally localized Wannier functions
• Kohn Anomalies and Electron-Phonon Interaction in Graphite
• Phonon anharmonicities in graphite and graphene
• Probing multiband superconductivity by point-contact spectroscopy
• Electron-Phonon Interactions in Graphene, Bilayer Graphene, and Graphite
• Adiabatic and non-adiabatic phonon dispersion in a Wannier function approach
• Correlation-enhanced electron-phonon coupling: Applications of GW and screened hybrid functional to bismuthates, chloronitrides, and other high Tc superconductors
• Coupled dynamics of electrons and phonons in metallic nanotubes: current saturation from hot phonons generation
• Anharmonic phonon frequency shift in MgB2
• Theoretical study of metal borides stability
• First-principles calculations of phonon frequencies, lifetimes and spectral functions from weak to strong anharmonicity: the example of palladium hydrides
• Phononic Weyl Nodal Straight Lines in High-Temperature Superconductor MgB${}_2$
• Kohn Anomaly in MgB2 by Inelastic X-Ray Scattering
• Sc substitution for Mg in MgB2: effects on Tc and Kohn anomaly
• Electron-phonon coupling and phonon self-energy in MgB${}_2$: do we really understand MgB${}_2$ Raman spectra ?
• Nontrivial Quantum Geometry and the Strength of Electron-Phonon Coupling
• Anharmonic effects in MgB2? A comparative inelastic X-ray scattering and Raman study
• Electron-phonon effects on the Raman spectrum in MgB${}_2$
• Phonon anomalies and dynamic stripes
• Ultrafast Hot Phonon Dynamics in MgB${}_2$ Driven by Anisotropic Electron-Phonon Coupling
• Isotope effect and bond-stretching phonon anomaly in high-Tc cuprates
• Soft-phonon-driven superconductivity in CaAlSi as seen by inelastic x-ray scattering
• Raman scattering investigation of the electron-phonon coupling in superconducting Nd(O,F)BiS${}_2$
• Electronic, dynamical and superconducting properties of CaBeSi
• Phonon anharmonic frequency shift induced by four-phonon scattering calculated from first principles
• Study of temperature dependent atomic correlations in MgB${}_2$
• Theory of Raman scattering from Leggett's collective mode in a multiband superconductor: Application to MgB${}_2$
• Giant electron-phonon anomaly in doped La2CuO4 and other cuprates
• Reversible magnetization of MgB2 single crystals with a two-gap nature
• Advances in point-contact spectroscopy: two-band superconductor MgB2 (A review)
• Ab initio calculation of low-energy collective charge-density excitations in MgB2
• Anharmonicity and self-energy effects of the E2g phonon in MgB2
• Lattice Dynamics of Ultrathin FeSe Films on SrTiO3
• Gap Anisotropy in Multiband Superconductors Based on Multiple Scattering Theory
• Nonadiabatic coupling effects in MgB${}_2$ reexamined
• Efficient first-principles methodology for the calculation of the all-phonon inelastic scattering in solids
• Two-phonon contributions to inelastic x-ray scattering spectra of MgB2
• Multi-Gap Superconductivity in MgB2: Magneto-Raman Spectroscopy
• Search for E_2g phonon modes in MgB_2 single crystals by point-contact spectroscopy
• Electron-doped organics: Charge-disproportionate insulators and Hubbard-Fröhlich metals
• Reversible magnetization measurement of the anisotropy of the London penetration depth in MgB2 single crystals
• Phonon anharmonicity and thermal conductivity of two-dimensional van der Waals materials: A review
• Anharmonic theory of superconductivity and its applications to emerging quantum materials
• Weak inter-band coupling in Mg${}^{10}$B${}_2$: a specific heat analysis
• Nonuniform grids for Brillouin zone integration and interpolation
• On Electron Transport in ZrB12, ZrB2 and MgB2
• Softening of the Bond-Stretching Phonon of Ba1-xKxBiO3 at the Metal to Insulator Transition
• Multiband superconductivity in Pb, H under pressure and CaBeSi from {\it ab-initio} calculations
• Raman Scattering Investigation of Electron Phonon Coupling in Carbon substituted MgB2
• Inelastic x-ray scattering as a probe of electronic correlations
• Isotope Effect on Electron-Phonon Interaction in Multiband Superconductor MgB2
• Fingerprints of hot-phonon physics in time-resolved correlated quantum lattice dynamics
• Accurate Electron-phonon Interactions from Advanced Density Functional Theory
• Vibron-vibron coupling from ab initio molecular dynamics simulations of a silicon cluster
• Strong long-wavelength electron-phonon coupling in Ta${}_2$Ni(Se,S)${}_5$
• Non--adiabatic effects lead to the breakdown of the semi-classical phonon concept
• Non-adiabatic phonon self-energy due to electrons with finite linewidths
• Overscreening-free electron-phonon interaction in realistic materials
• Properties and challenges of hot-phonon physics in metals: MgB${}_2$ and other compounds