Evidence of electron-phonon interaction in Al-substituted Mg 1-xAlxB2

T. Yokoo; T. Muranaka; M. Arai; K. Papagelis; K. Prassides; J. Taylor; S. M. Bennington; J. Akimitsu

doi:10.1023/b:josc.0000021213.36661.05

Evidence of electron-phonon interaction in Al-substituted Mg _1-xAl_xB₂

T. Yokoo, T. Muranaka, M. Arai, K. Papagelis, K. Prassides, J. Taylor, S. M. Bennington, J. Akimitsu

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

3 Citations (Scopus)

Abstract

Phonon density of states in Al substituted Mg_1-xAl _xB₂ has been studied by means of inelastic neutron scattering experiments with pulsed neutron time-of-flight technique. Phonon dynamics have a significant role for realizing superconductivity in the recent discovered superconductor MgB₂. We present a systematic investigation on generalized phonon density of states (PDOS) up to E = 120 meV on Al content of x = 0.1, 0.25, and 0.5. We have clearly observed a large effect on the PDOS by Al substitution; a large energy shift occurs around at 70 meV and 89 meV. We have also observed a visible increase of PDOS at a particular energy range below T_c. Those phonon states are related with E_2g mode to be expected to have a strong coupling with the electron states at the Γ-A region.

Original language	English
Pages (from-to)	199-203
Number of pages	5
Journal	Journal of Superconductivity and Novel Magnetism
Volume	17
Issue number	2
DOIs	https://doi.org/10.1023/b:josc.0000021213.36661.05
Publication status	Published - 2004
Externally published	Yes

Keywords

Electron-phonon coupling
MgB
Neutron scattering
Phonon
Superconductivity

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

Access to Document

10.1023/b:josc.0000021213.36661.05

Cite this

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title = "Evidence of electron-phonon interaction in Al-substituted Mg 1-xAlxB2",

abstract = "Phonon density of states in Al substituted Mg1-xAl xB2 has been studied by means of inelastic neutron scattering experiments with pulsed neutron time-of-flight technique. Phonon dynamics have a significant role for realizing superconductivity in the recent discovered superconductor MgB2. We present a systematic investigation on generalized phonon density of states (PDOS) up to E = 120 meV on Al content of x = 0.1, 0.25, and 0.5. We have clearly observed a large effect on the PDOS by Al substitution; a large energy shift occurs around at 70 meV and 89 meV. We have also observed a visible increase of PDOS at a particular energy range below Tc. Those phonon states are related with E2g mode to be expected to have a strong coupling with the electron states at the Γ-A region.",

keywords = "Electron-phonon coupling, MgB, Neutron scattering, Phonon, Superconductivity",

author = "T. Yokoo and T. Muranaka and M. Arai and K. Papagelis and K. Prassides and J. Taylor and Bennington, {S. M.} and J. Akimitsu",

note = "Funding Information: The neutron scattering experiments were performed under the UK–Japan Collaboration Program on Neutron Scattering. One of the authors (TY) was supported by Grant-in-Aid for Scientific Research and Grant-in-Aid for JSPS Fellows.",

year = "2004",

doi = "10.1023/b:josc.0000021213.36661.05",

language = "English",

volume = "17",

pages = "199--203",

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T1 - Evidence of electron-phonon interaction in Al-substituted Mg 1-xAlxB2

AU - Yokoo, T.

AU - Muranaka, T.

AU - Arai, M.

AU - Papagelis, K.

AU - Prassides, K.

AU - Taylor, J.

AU - Bennington, S. M.

AU - Akimitsu, J.

N1 - Funding Information: The neutron scattering experiments were performed under the UK–Japan Collaboration Program on Neutron Scattering. One of the authors (TY) was supported by Grant-in-Aid for Scientific Research and Grant-in-Aid for JSPS Fellows.

PY - 2004

Y1 - 2004

N2 - Phonon density of states in Al substituted Mg1-xAl xB2 has been studied by means of inelastic neutron scattering experiments with pulsed neutron time-of-flight technique. Phonon dynamics have a significant role for realizing superconductivity in the recent discovered superconductor MgB2. We present a systematic investigation on generalized phonon density of states (PDOS) up to E = 120 meV on Al content of x = 0.1, 0.25, and 0.5. We have clearly observed a large effect on the PDOS by Al substitution; a large energy shift occurs around at 70 meV and 89 meV. We have also observed a visible increase of PDOS at a particular energy range below Tc. Those phonon states are related with E2g mode to be expected to have a strong coupling with the electron states at the Γ-A region.

AB - Phonon density of states in Al substituted Mg1-xAl xB2 has been studied by means of inelastic neutron scattering experiments with pulsed neutron time-of-flight technique. Phonon dynamics have a significant role for realizing superconductivity in the recent discovered superconductor MgB2. We present a systematic investigation on generalized phonon density of states (PDOS) up to E = 120 meV on Al content of x = 0.1, 0.25, and 0.5. We have clearly observed a large effect on the PDOS by Al substitution; a large energy shift occurs around at 70 meV and 89 meV. We have also observed a visible increase of PDOS at a particular energy range below Tc. Those phonon states are related with E2g mode to be expected to have a strong coupling with the electron states at the Γ-A region.

KW - Electron-phonon coupling

KW - MgB

KW - Neutron scattering

KW - Phonon

KW - Superconductivity

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