A Raman scattering study of superconductivity in MgB2

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

Research output: Contribution to journalConference article

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 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.

Original languageEnglish
Pages (from-to)131-132
Number of pages2
JournalPhysica C: Superconductivity and its applications
Volume388-389
DOIs
Publication statusPublished - 2003 May
Eventproceedings of the 23rd international conference on low temper - Hiroshima, Japan
Duration: 2002 Aug 202002 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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