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

Global course of Engineering and Science

Research output: Contribution to journal › Conference article

6 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 1
Event	proceedings of the 23rd international conference on low temper - Hiroshima, Japan Duration: 2002 Aug 20 → 2002 Aug 27

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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

Cite this

Quilty, J. W., Lee, S., Yamamoto, A., Tajima, S., & Yamanaka, A. (2003). A Raman scattering study of superconductivity in MgB₂. Physica C: Superconductivity and its applications, 388-389, 131-132. https://doi.org/10.1016/S0921-4534(02)02680-1

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AU - Yamanaka, Akio

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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.

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Access to Document

10.1016/S0921-4534(02)02680-1