A Raman scattering study of superconductivity in MgB2

James W. Quilty; Sergey Lee; Ayako Yamamoto; Setsuko Tajima; Akio Yamanaka

doi:10.1016/S0921-4534(02)02680-1

A Raman scattering study of superconductivity in MgB₂

James W. Quilty, Sergey Lee, Ayako Yamamoto, Setsuko Tajima, Akio Yamanaka

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

7 Citations (Scopus)

Abstract

Measurements of the in-plane and out-of-plane electronic Raman continuum in MgB₂ single crystals show markedly different behaviour below T_c, indicative of a complex gap structure. In xx and xy polarisation configurations, a sharp pair-breaking peak is seen near 100 cm^-1 but no scattering threshold forms directly below the peak. In zz and zx polarisations, a threshold is seen at 30 cm^-1 but no pair-breaking peak appears. This behaviour can be understood in terms of band-dependent impurity scattering effects on two separate gaps.

Original language	English
Pages (from-to)	131-132
Number of pages	2
Journal	Physica C: Superconductivity and its applications
Volume	388-389
DOIs	https://doi.org/10.1016/S0921-4534(02)02680-1
Publication status	Published - 2003 May
Externally published	Yes
Event	proceedings of the 23rd international conference on low temper - Hiroshima, Japan Duration: 2002 Aug 20 → 2002 Aug 27

Keywords

MgB
Raman spectroscopy
Superconducting gap

ASJC Scopus subject areas

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

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abstract = "Measurements of the in-plane and out-of-plane electronic Raman continuum in MgB2 single crystals show markedly different behaviour below Tc, indicative of a complex gap structure. In xx and xy polarisation configurations, a sharp pair-breaking peak is seen near 100 cm-1 but no scattering threshold forms directly below the peak. In zz and zx polarisations, a threshold is seen at 30 cm-1 but no pair-breaking peak appears. This behaviour can be understood in terms of band-dependent impurity scattering effects on two separate gaps.",

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T1 - A Raman scattering study of superconductivity in MgB2

AU - Quilty, James W.

AU - Lee, Sergey

AU - Yamamoto, Ayako

AU - Tajima, Setsuko

AU - Yamanaka, Akio

PY - 2003/5

Y1 - 2003/5

N2 - Measurements of the in-plane and out-of-plane electronic Raman continuum in MgB2 single crystals show markedly different behaviour below Tc, indicative of a complex gap structure. In xx and xy polarisation configurations, a sharp pair-breaking peak is seen near 100 cm-1 but no scattering threshold forms directly below the peak. In zz and zx polarisations, a threshold is seen at 30 cm-1 but no pair-breaking peak appears. This behaviour can be understood in terms of band-dependent impurity scattering effects on two separate gaps.

AB - Measurements of the in-plane and out-of-plane electronic Raman continuum in MgB2 single crystals show markedly different behaviour below Tc, indicative of a complex gap structure. In xx and xy polarisation configurations, a sharp pair-breaking peak is seen near 100 cm-1 but no scattering threshold forms directly below the peak. In zz and zx polarisations, a threshold is seen at 30 cm-1 but no pair-breaking peak appears. This behaviour can be understood in terms of band-dependent impurity scattering effects on two separate gaps.

KW - MgB

KW - Raman spectroscopy

KW - Superconducting gap

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DO - 10.1016/S0921-4534(02)02680-1

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VL - 388-389

SP - 131

EP - 132

JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

SN - 0921-4534

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