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Phonons, Oxygen Isotope Effect and Superconductivity in Ba1−xKxBiO3

  • W. Jin (a1) (a2) (a3), C.K. Loong (a1) (a4), D.G. Hinks (a1) (a3), P. Vashishta (a1) (a3), R.K. Kalia (a1) (a3), M. H. Degani (a1) (a3), D.L. Price (a1) (a3), J.D. Jorgensen (a1) (a3) and B. Dabrowski (a1) (a2) (a3)...

Abstract

The phonon densities-of-states (DOS) of superconducting Ba1−xKxBi16O3 and Ba1−xKxBi18O3 (x=0.4) are determined using molecular dynamics (MD) simulations and inelastic neutron scattering measurements. The reference isotope-effect exponent is obtained from the mass variation of the first frequency moment of the phonon DOS. The energy gap, oxygen isotope-effect exponent and electron tunneling characteristics are calculated within the framework of Eliashberg theory of electron-phonon coupling.

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Phonons, Oxygen Isotope Effect and Superconductivity in Ba1−xKxBiO3

  • W. Jin (a1) (a2) (a3), C.K. Loong (a1) (a4), D.G. Hinks (a1) (a3), P. Vashishta (a1) (a3), R.K. Kalia (a1) (a3), M. H. Degani (a1) (a3), D.L. Price (a1) (a3), J.D. Jorgensen (a1) (a3) and B. Dabrowski (a1) (a2) (a3)...

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