Lattice dynamics and electron-phonon coupling in transition metal diborides

Abstract

The phonon density-of-states of transition metal diborides TMB2 with TM = Ti, V, Ta, Nb and Y has been measured using the technique of inelastic neutron scattering. The experimental data are compared with ab initio density functional calculations whereby an excellent agreement is registered. The calculations thus can be used to obtain electron-phonon spectral functions within the isotropic limit. A comparison to similar data for MgB2 and AlB2 which were subject of prior publications as well as parameters important for the superconducting properties are part of the discussion.

4 pages, 3 figures

References in corpus (7)

• Superconductivity of metallic boron in MgB_2
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• Phonon dispersion and electron-phonon coupling in MgB_2 and AlB_2
• Direct evidence for a multiple superconducting gap in MgB2 from high-resolution photoemission spectroscopy
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Cited by in corpus (10)

• Comparative study of the electronic structure, phonon spectra and electron-phonon interaction of ZrB2 and TiB2
• Thermodynamic stabilities of ternary metal borides: An ab initio guide for synthesizing layered superconductors
• Doping-induced superconductivity of ZrB${}_2$ and HfB${}_2$
• Advances in point-contact spectroscopy: two-band superconductor MgB2 (A review)
• Weak inter-band coupling in Mg${}^{10}$B${}_2$: a specific heat analysis
• Diboride compounds doped with transition metals$\unicode{x2013}$a route to superconductivity through structure stabilization as well as defects
• Nb-substitution suppresses the superconducting critical temperature of pressurized MoB${}_2$
• Structure and properties of the films based on ternary transition metal borides: theory and experiment
• Electron-phonon coupling and superconductivity in $\alpha$-MoB${}_2$ as a function of pressure
• Exfoliation of Two-Dimensional Nanosheets of Metal Diborides