Double-well oscillating potential of oxygen atoms in perovskite system Ba(K)BiO3: EXAFS - analysis results

A. P. Menushenkov; K. V. Klementev; P. V. Konarev; A. A. Meshkov; S. Benazeth; J. Purans

doi:10.1016/S0168-9002(99)00709-3

Double-well oscillating potential of oxygen atoms in perovskite system Ba(K)BiO₃: EXAFS - analysis results

A. P. Menushenkov^*
, K. V. Klementev
, P. V. Konarev
, A. A. Meshkov
, S. Benazeth
, J. Purans

^*Corresponding author for this work

Thin Films Laboratory, Institute of Solid State Physics

Moscow Engineering Physics Institute
L'Orme des Merisiers

Research output: Contribution to journal › Conference article › peer-review

8 Citations (Scopus)

Abstract

Temperature-dependent X-ray absorption investigations were made on the Bi L₃-edge in Ba_1-xK_xBiO₃ with x = 0.0 h, 0.4 and 0.5. For the superconducting samples (x = 0.4 and 0.5) it has been found that the local structure differs from the ideal cubic in contrast to the neutron and X-ray diffraction data. The provided analysis of the EXAFS spectra indicates that the oxygen atoms move in double-well potential produced by the existence of two non-equivalent octahedral types of the oxygen environment of bismuth. The vibrations in such a potential lead to modulations of the Bi-O lengths with low frequency which is determined by the soft oxygen octahedron rotation mode frequency. This induces strong electron-phonon interaction and may be the reason for relatively high-temperature transition (T_c approx. 30 K) to the superconducting state.

Original language	English
Pages (from-to)	340-344
Number of pages	5
Journal	Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume	448
Issue number	1
DOIs	https://doi.org/10.1016/S0168-9002(99)00709-3
Publication status	Published - 21 Jun 2000
Event	12th National Synchrotron Radiation Conference - SR'98 - Novosibirsk, Russia Duration: 14 Jul 1998 → 18 Jul 1998

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Menushenkov, A. P., Klementev, K. V., Konarev, P. V., Meshkov, A. A., Benazeth, S., & Purans, J. (2000). Double-well oscillating potential of oxygen atoms in perovskite system Ba(K)BiO₃: EXAFS - analysis results. Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 448(1), 340-344. https://doi.org/10.1016/S0168-9002(99)00709-3

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title = "Double-well oscillating potential of oxygen atoms in perovskite system Ba(K)BiO3: EXAFS - analysis results",

abstract = "Temperature-dependent X-ray absorption investigations were made on the Bi L3-edge in Ba1-xKxBiO3 with x = 0.0 h, 0.4 and 0.5. For the superconducting samples (x = 0.4 and 0.5) it has been found that the local structure differs from the ideal cubic in contrast to the neutron and X-ray diffraction data. The provided analysis of the EXAFS spectra indicates that the oxygen atoms move in double-well potential produced by the existence of two non-equivalent octahedral types of the oxygen environment of bismuth. The vibrations in such a potential lead to modulations of the Bi-O lengths with low frequency which is determined by the soft oxygen octahedron rotation mode frequency. This induces strong electron-phonon interaction and may be the reason for relatively high-temperature transition (Tc approx. 30 K) to the superconducting state.",

author = "Menushenkov, \{A. P.\} and Klementev, \{K. V.\} and Konarev, \{P. V.\} and Meshkov, \{A. A.\} and S. Benazeth and J. Purans",

year = "2000",

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doi = "10.1016/S0168-9002(99)00709-3",

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Menushenkov, AP, Klementev, KV, Konarev, PV, Meshkov, AA, Benazeth, S & Purans, J 2000, 'Double-well oscillating potential of oxygen atoms in perovskite system Ba(K)BiO₃: EXAFS - analysis results', Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, vol. 448, no. 1, pp. 340-344. https://doi.org/10.1016/S0168-9002(99)00709-3

Double-well oscillating potential of oxygen atoms in perovskite system Ba(K)BiO₃: EXAFS - analysis results. / Menushenkov, A. P.; Klementev, K. V.; Konarev, P. V. et al.
In: Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 448, No. 1, 21.06.2000, p. 340-344.

Research output: Contribution to journal › Conference article › peer-review

TY - JOUR

T1 - Double-well oscillating potential of oxygen atoms in perovskite system Ba(K)BiO3

T2 - 12th National Synchrotron Radiation Conference - SR'98

AU - Menushenkov, A. P.

AU - Klementev, K. V.

AU - Konarev, P. V.

AU - Meshkov, A. A.

AU - Benazeth, S.

AU - Purans, J.

PY - 2000/6/21

Y1 - 2000/6/21

N2 - Temperature-dependent X-ray absorption investigations were made on the Bi L3-edge in Ba1-xKxBiO3 with x = 0.0 h, 0.4 and 0.5. For the superconducting samples (x = 0.4 and 0.5) it has been found that the local structure differs from the ideal cubic in contrast to the neutron and X-ray diffraction data. The provided analysis of the EXAFS spectra indicates that the oxygen atoms move in double-well potential produced by the existence of two non-equivalent octahedral types of the oxygen environment of bismuth. The vibrations in such a potential lead to modulations of the Bi-O lengths with low frequency which is determined by the soft oxygen octahedron rotation mode frequency. This induces strong electron-phonon interaction and may be the reason for relatively high-temperature transition (Tc approx. 30 K) to the superconducting state.

AB - Temperature-dependent X-ray absorption investigations were made on the Bi L3-edge in Ba1-xKxBiO3 with x = 0.0 h, 0.4 and 0.5. For the superconducting samples (x = 0.4 and 0.5) it has been found that the local structure differs from the ideal cubic in contrast to the neutron and X-ray diffraction data. The provided analysis of the EXAFS spectra indicates that the oxygen atoms move in double-well potential produced by the existence of two non-equivalent octahedral types of the oxygen environment of bismuth. The vibrations in such a potential lead to modulations of the Bi-O lengths with low frequency which is determined by the soft oxygen octahedron rotation mode frequency. This induces strong electron-phonon interaction and may be the reason for relatively high-temperature transition (Tc approx. 30 K) to the superconducting state.

UR - https://www.scopus.com/pages/publications/0034205404

U2 - 10.1016/S0168-9002(99)00709-3

DO - 10.1016/S0168-9002(99)00709-3

M3 - Conference article

AN - SCOPUS:0034205404

SN - 0168-9002

VL - 448

SP - 340

EP - 344

JO - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

IS - 1

Y2 - 14 July 1998 through 18 July 1998

ER -

Menushenkov AP, Klementev KV, Konarev PV, Meshkov AA, Benazeth S, Purans J. Double-well oscillating potential of oxygen atoms in perovskite system Ba(K)BiO₃: EXAFS - analysis results. Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 2000 Jun 21;448(1):340-344. doi: 10.1016/S0168-9002(99)00709-3

Double-well oscillating potential of oxygen atoms in perovskite system Ba(K)BiO₃: EXAFS - analysis results

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