Experimental study of electron-phonon interaction in MgB2

Setsuko Tajima; Takahiko Masui; James Quilty; Sergey Lee; Ayako Yamamoto; Akio Yamanaka

doi:10.1016/S0921-4534(02)02670-9

Experimental study of electron-phonon interaction in MgB₂

Setsuko Tajima, Takahiko Masui, James Quilty, Sergey Lee, Ayako Yamamoto, Akio Yamanaka

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

5 Citations (Scopus)

Abstract

From precise analyses of resistivity data and Raman scattering spectra from MgB₂ single crystals, we have extracted the electron-phonon (e-p) coupling constants and specified the relevant phonon mode and electronic bands that play a main role in the superconductivity. It has been demonstrated that the strong coupling of the E_2g boron vibrational mode with the σ-band holes governs the normal state conduction and the high-T_c superconductivity mechanism. The smaller gap on the π-bands found by k-selective Raman scattering measurements is reconciled with the weak e-p coupling and large scattering rate in these bands.

Original language	English
Pages (from-to)	103-104
Number of pages	2
Journal	Physica C: Superconductivity and its applications
Volume	388-389
DOIs	https://doi.org/10.1016/S0921-4534(02)02670-9
Publication status	Published - 2003 May 1
Externally published	Yes
Event	proceedings of the 23rd international conference on low temper - Hiroshima, Japan Duration: 2002 Aug 20 → 2002 Aug 27

Keywords

Electron-phonon coupling
MgB
Raman scattering
Two gaps

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

Access to Document

10.1016/S0921-4534(02)02670-9

Cite this

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abstract = "From precise analyses of resistivity data and Raman scattering spectra from MgB2 single crystals, we have extracted the electron-phonon (e-p) coupling constants and specified the relevant phonon mode and electronic bands that play a main role in the superconductivity. It has been demonstrated that the strong coupling of the E2g boron vibrational mode with the σ-band holes governs the normal state conduction and the high-Tc superconductivity mechanism. The smaller gap on the π-bands found by k-selective Raman scattering measurements is reconciled with the weak e-p coupling and large scattering rate in these bands.",

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T1 - Experimental study of electron-phonon interaction in MgB2

AU - Tajima, Setsuko

AU - Masui, Takahiko

AU - Quilty, James

AU - Lee, Sergey

AU - Yamamoto, Ayako

AU - Yamanaka, Akio

PY - 2003/5/1

Y1 - 2003/5/1

N2 - From precise analyses of resistivity data and Raman scattering spectra from MgB2 single crystals, we have extracted the electron-phonon (e-p) coupling constants and specified the relevant phonon mode and electronic bands that play a main role in the superconductivity. It has been demonstrated that the strong coupling of the E2g boron vibrational mode with the σ-band holes governs the normal state conduction and the high-Tc superconductivity mechanism. The smaller gap on the π-bands found by k-selective Raman scattering measurements is reconciled with the weak e-p coupling and large scattering rate in these bands.

AB - From precise analyses of resistivity data and Raman scattering spectra from MgB2 single crystals, we have extracted the electron-phonon (e-p) coupling constants and specified the relevant phonon mode and electronic bands that play a main role in the superconductivity. It has been demonstrated that the strong coupling of the E2g boron vibrational mode with the σ-band holes governs the normal state conduction and the high-Tc superconductivity mechanism. The smaller gap on the π-bands found by k-selective Raman scattering measurements is reconciled with the weak e-p coupling and large scattering rate in these bands.

KW - Electron-phonon coupling

KW - MgB

KW - Raman scattering

KW - Two gaps

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