Oxygen isotope effect in superconducting Ba1-xKxBiO3 from phonon density of states

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

doi:10.1103/PhysRevLett.66.3217

Oxygen isotope effect in superconducting Ba1-xKxBiO3 from phonon density of states

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

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

43 Scopus citations

Abstract

The variation of the phonon spectrum of Ba0.6K0.4BiO3 upon oxygen isotope substitution is determined by inelastic neutron scattering (INS). By combining the INS results with molecular-dynamics computer simulation, a value of 0.42±0.05 is obtained for the reference isotope-effect exponent. This is close to the isotope-effect exponent determined from the variation of Tc upon oxygen substitution, indicating that Ba0.6K0.4BiO3 is a weak-coupling superconductor with large matrix elements coupling the electrons to high-energy phonons involving oxygen vibrations. © 1991 The American Physical Society.

Original language	English
Pages (from-to)	3217-3220
Number of pages	4
Journal	Physical Review Letters
Volume	66
Issue number	24
DOIs	https://doi.org/10.1103/PhysRevLett.66.3217
State	Published - Jan 1 1991
Externally published	Yes

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title = "Oxygen isotope effect in superconducting Ba1-xKxBiO3 from phonon density of states",

abstract = "The variation of the phonon spectrum of Ba0.6K0.4BiO3 upon oxygen isotope substitution is determined by inelastic neutron scattering (INS). By combining the INS results with molecular-dynamics computer simulation, a value of 0.42±0.05 is obtained for the reference isotope-effect exponent. This is close to the isotope-effect exponent determined from the variation of Tc upon oxygen substitution, indicating that Ba0.6K0.4BiO3 is a weak-coupling superconductor with large matrix elements coupling the electrons to high-energy phonons involving oxygen vibrations. {\textcopyright} 1991 The American Physical Society.",

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

year = "1991",

month = jan,

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doi = "10.1103/PhysRevLett.66.3217",

language = "English",

volume = "66",

pages = "3217--3220",

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TY - JOUR

T1 - Oxygen isotope effect in superconducting Ba1-xKxBiO3 from phonon density of states

AU - Loong, C. K.

AU - Hinks, D. G.

AU - Vashishta, P.

AU - Jin, W.

AU - Kalia, R. K.

AU - Degani, M. H.

AU - Price, D. L.

AU - Jorgensen, J. D.

AU - Dabrowski, B.

AU - Mitchell, A. W.

AU - Richards, D. R.

AU - Zheng, Y.

PY - 1991/1/1

Y1 - 1991/1/1

N2 - The variation of the phonon spectrum of Ba0.6K0.4BiO3 upon oxygen isotope substitution is determined by inelastic neutron scattering (INS). By combining the INS results with molecular-dynamics computer simulation, a value of 0.42±0.05 is obtained for the reference isotope-effect exponent. This is close to the isotope-effect exponent determined from the variation of Tc upon oxygen substitution, indicating that Ba0.6K0.4BiO3 is a weak-coupling superconductor with large matrix elements coupling the electrons to high-energy phonons involving oxygen vibrations. © 1991 The American Physical Society.

AB - The variation of the phonon spectrum of Ba0.6K0.4BiO3 upon oxygen isotope substitution is determined by inelastic neutron scattering (INS). By combining the INS results with molecular-dynamics computer simulation, a value of 0.42±0.05 is obtained for the reference isotope-effect exponent. This is close to the isotope-effect exponent determined from the variation of Tc upon oxygen substitution, indicating that Ba0.6K0.4BiO3 is a weak-coupling superconductor with large matrix elements coupling the electrons to high-energy phonons involving oxygen vibrations. © 1991 The American Physical Society.

UR - https://www.scopus.com/pages/publications/0001631853

U2 - 10.1103/PhysRevLett.66.3217

DO - 10.1103/PhysRevLett.66.3217

M3 - Article

SN - 0031-9007

VL - 66

SP - 3217

EP - 3220

JO - Physical Review Letters

JF - Physical Review Letters

IS - 24

ER -

Oxygen isotope effect in superconducting Ba1-xKxBiO3 from phonon density of states

Abstract

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