Vibrational Spectroscopy of Superconducting MgB2 by Neutron Inelastic Scattering

Takahiro Muranaka; Serena Margadonna; Isabelle Maurin; Kierin Brigatti; Daniele Colognesi; Kosmas Prassides; Yoshihiro Iwasa; Masatoshi Arai; Masaki Takata; Jun Akimitsu

doi:10.1143/JPSJ.70.1480

Vibrational Spectroscopy of Superconducting MgB₂ by Neutron Inelastic Scattering

Takahiro Muranaka, Serena Margadonna, Isabelle Maurin, Kierin Brigatti, Daniele Colognesi, Kosmas Prassides, Yoshihiro Iwasa, Masatoshi Arai, Masaki Takata, Jun Akimitsu

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

2 Citations (Scopus)

Abstract

Neutron inelastic scattering measurements have been performed on superconducting MgB₂ above and below T_c. The temperature dependence of the generalized phonon density-of-states showed clear anomalous behaviour near 24 meV in the acoustic phonon region, which may be interpreted as evidence of a substantial contribution to the total electron-phonon coupling strength deriving from these phonons. Weaker evidence for a corresponding response in the high-energy B bond stretching phonons was also encountered.

Original language	English
Pages (from-to)	1480-1482
Number of pages	3
Journal	journal of the physical society of japan
Volume	70
Issue number	6
DOIs	https://doi.org/10.1143/JPSJ.70.1480
Publication status	Published - Jun 2001
Externally published	Yes

Keywords

Electron-phonon coupling
MgB
Neutron inelastic scattering
Phonon density of states
Superconductivity

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.1143/JPSJ.70.1480

Cite this

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title = "Vibrational Spectroscopy of Superconducting MgB2 by Neutron Inelastic Scattering",

abstract = "Neutron inelastic scattering measurements have been performed on superconducting MgB2 above and below Tc. The temperature dependence of the generalized phonon density-of-states showed clear anomalous behaviour near 24 meV in the acoustic phonon region, which may be interpreted as evidence of a substantial contribution to the total electron-phonon coupling strength deriving from these phonons. Weaker evidence for a corresponding response in the high-energy B bond stretching phonons was also encountered.",

keywords = "Electron-phonon coupling, MgB, Neutron inelastic scattering, Phonon density of states, Superconductivity",

author = "Takahiro Muranaka and Serena Margadonna and Isabelle Maurin and Kierin Brigatti and Daniele Colognesi and Kosmas Prassides and Yoshihiro Iwasa and Masatoshi Arai and Masaki Takata and Jun Akimitsu",

year = "2001",

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doi = "10.1143/JPSJ.70.1480",

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T1 - Vibrational Spectroscopy of Superconducting MgB2 by Neutron Inelastic Scattering

AU - Muranaka, Takahiro

AU - Margadonna, Serena

AU - Maurin, Isabelle

AU - Brigatti, Kierin

AU - Colognesi, Daniele

AU - Prassides, Kosmas

AU - Iwasa, Yoshihiro

AU - Arai, Masatoshi

AU - Takata, Masaki

AU - Akimitsu, Jun

PY - 2001/6

Y1 - 2001/6

N2 - Neutron inelastic scattering measurements have been performed on superconducting MgB2 above and below Tc. The temperature dependence of the generalized phonon density-of-states showed clear anomalous behaviour near 24 meV in the acoustic phonon region, which may be interpreted as evidence of a substantial contribution to the total electron-phonon coupling strength deriving from these phonons. Weaker evidence for a corresponding response in the high-energy B bond stretching phonons was also encountered.

AB - Neutron inelastic scattering measurements have been performed on superconducting MgB2 above and below Tc. The temperature dependence of the generalized phonon density-of-states showed clear anomalous behaviour near 24 meV in the acoustic phonon region, which may be interpreted as evidence of a substantial contribution to the total electron-phonon coupling strength deriving from these phonons. Weaker evidence for a corresponding response in the high-energy B bond stretching phonons was also encountered.

KW - Electron-phonon coupling

KW - MgB

KW - Neutron inelastic scattering

KW - Phonon density of states

KW - Superconductivity

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