High-energy oxygen phonon modes and superconductivity in Ba1-xKxBiO3: An inelastic-neutron-scattering experiment and molecular-dynamics simulation

C. K. Loong; P. Vashishta; R. K. Kalia; M. H. Degani; D. L. Price; J. D. Jorgensen; D. G. Hinks; B. Dabrowski; A. W. Mitchell; D. R. Richards; Y. Zheng

doi:10.1103/PhysRevLett.62.2628

High-energy oxygen phonon modes and superconductivity in Ba1-xKxBiO3: An inelastic-neutron-scattering experiment and molecular-dynamics simulation

C. K. Loong
, P. Vashishta
, R. K. Kalia
, M. H. Degani
, D. L. Price
, J. D. Jorgensen
, D. G. Hinks
, B. Dabrowski
, A. W. Mitchell
, D. R. Richards
, Y. Zheng

Research output: Contribution to journal › Article › peer-review

90 Scopus citations

Abstract

Phonon densities of states of insulating BaBiO3 and superconducting Ba0.6K0.4BiO3 are determined by neutron-scattering experiments. The main peaks in BaBiO3 occur at 35, 43, 63, and 71 meV. In Ba0.6K0.4BiO3, the phonon spectrum softens and is comprised of two bands around 30 and 60 meV. Molecular-dynamics results, which are in good agreement with the experiment, reveal that the observed phonon peaks are due to oxygen vibrations. The softening of oxygen phonon modes around 30 and 60 meV is due to electron-phonon coupling, indicating that Ba0.6K0.4BiO3 is a normal BCS superconductor. © 1989 The American Physical Society.

Original language	English
Pages (from-to)	2628-2631
Number of pages	4
Journal	Physical Review Letters
Volume	62
Issue number	22
DOIs	https://doi.org/10.1103/PhysRevLett.62.2628
State	Published - Jan 1 1989
Externally published	Yes

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10.1103/PhysRevLett.62.2628

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Loong, C. K., Vashishta, P., Kalia, R. K., Degani, M. H., Price, D. L., Jorgensen, J. D., Hinks, D. G., Dabrowski, B., Mitchell, A. W., Richards, D. R., & Zheng, Y. (1989). High-energy oxygen phonon modes and superconductivity in Ba1-xKxBiO3: An inelastic-neutron-scattering experiment and molecular-dynamics simulation. Physical Review Letters, 62(22), 2628-2631. https://doi.org/10.1103/PhysRevLett.62.2628

@article{a2579e1277924108a029f55f3d21f7df,

title = "High-energy oxygen phonon modes and superconductivity in Ba1-xKxBiO3: An inelastic-neutron-scattering experiment and molecular-dynamics simulation",

abstract = "Phonon densities of states of insulating BaBiO3 and superconducting Ba0.6K0.4BiO3 are determined by neutron-scattering experiments. The main peaks in BaBiO3 occur at 35, 43, 63, and 71 meV. In Ba0.6K0.4BiO3, the phonon spectrum softens and is comprised of two bands around 30 and 60 meV. Molecular-dynamics results, which are in good agreement with the experiment, reveal that the observed phonon peaks are due to oxygen vibrations. The softening of oxygen phonon modes around 30 and 60 meV is due to electron-phonon coupling, indicating that Ba0.6K0.4BiO3 is a normal BCS superconductor. {\textcopyright} 1989 The American Physical Society.",

author = "Loong, \{C. K.\} and P. Vashishta and Kalia, \{R. K.\} and Degani, \{M. H.\} and Price, \{D. L.\} and Jorgensen, \{J. D.\} and Hinks, \{D. G.\} and B. Dabrowski and Mitchell, \{A. W.\} and Richards, \{D. R.\} and Y. Zheng",

year = "1989",

month = jan,

day = "1",

doi = "10.1103/PhysRevLett.62.2628",

language = "English",

volume = "62",

pages = "2628--2631",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

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Loong, CK, Vashishta, P, Kalia, RK, Degani, MH, Price, DL, Jorgensen, JD, Hinks, DG, Dabrowski, B, Mitchell, AW, Richards, DR & Zheng, Y 1989, 'High-energy oxygen phonon modes and superconductivity in Ba1-xKxBiO3: An inelastic-neutron-scattering experiment and molecular-dynamics simulation', Physical Review Letters, vol. 62, no. 22, pp. 2628-2631. https://doi.org/10.1103/PhysRevLett.62.2628

TY - JOUR

T1 - High-energy oxygen phonon modes and superconductivity in Ba1-xKxBiO3: An inelastic-neutron-scattering experiment and molecular-dynamics simulation

AU - Loong, C. K.

AU - Vashishta, P.

AU - Kalia, R. K.

AU - Degani, M. H.

AU - Price, D. L.

AU - Jorgensen, J. D.

AU - Hinks, D. G.

AU - Dabrowski, B.

AU - Mitchell, A. W.

AU - Richards, D. R.

AU - Zheng, Y.

PY - 1989/1/1

Y1 - 1989/1/1

N2 - Phonon densities of states of insulating BaBiO3 and superconducting Ba0.6K0.4BiO3 are determined by neutron-scattering experiments. The main peaks in BaBiO3 occur at 35, 43, 63, and 71 meV. In Ba0.6K0.4BiO3, the phonon spectrum softens and is comprised of two bands around 30 and 60 meV. Molecular-dynamics results, which are in good agreement with the experiment, reveal that the observed phonon peaks are due to oxygen vibrations. The softening of oxygen phonon modes around 30 and 60 meV is due to electron-phonon coupling, indicating that Ba0.6K0.4BiO3 is a normal BCS superconductor. © 1989 The American Physical Society.

AB - Phonon densities of states of insulating BaBiO3 and superconducting Ba0.6K0.4BiO3 are determined by neutron-scattering experiments. The main peaks in BaBiO3 occur at 35, 43, 63, and 71 meV. In Ba0.6K0.4BiO3, the phonon spectrum softens and is comprised of two bands around 30 and 60 meV. Molecular-dynamics results, which are in good agreement with the experiment, reveal that the observed phonon peaks are due to oxygen vibrations. The softening of oxygen phonon modes around 30 and 60 meV is due to electron-phonon coupling, indicating that Ba0.6K0.4BiO3 is a normal BCS superconductor. © 1989 The American Physical Society.

UR - https://www.scopus.com/pages/publications/25744452697

U2 - 10.1103/PhysRevLett.62.2628

DO - 10.1103/PhysRevLett.62.2628

M3 - Article

SN - 0031-9007

VL - 62

SP - 2628

EP - 2631

JO - Physical Review Letters

JF - Physical Review Letters

IS - 22

ER -

High-energy oxygen phonon modes and superconductivity in Ba1-xKxBiO3: An inelastic-neutron-scattering experiment and molecular-dynamics simulation

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