Journal
PHYSICAL REVIEW B
Volume 82, Issue 2, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.82.024302
Keywords
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Funding
- RFBR [08-02-00430]
- Russian State [02.740.11.0433]
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The first ab initio calculations using ultrasoft pseudopotentials within the local-density approximation in superconducting ZrB12 are reported, together with an inelastic neutron scattering study of its lattice dynamics. As in previously studied rare-earth dodecaborides, the phonon spectra are mainly determined by vibrations of the rigid boron network whereas Zr atoms vibrations have a quasilocal character and are localized in a narrow energy range around E approximate to 17 meV. The results consistently indicate that the phonon modes corresponding to Zr vibrations are responsible for a considerable electron-phonon interaction and could take part in the formation of the superconducting state below T-c approximate to 6 K as was suggested previously.
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