De Haas-van Alphen effect in single crystal MgB2

A. Carrington, J. R. Cooper, N. E. Hussey, P. J. Meeson, E. A. Yelland, S. Lee, A. Yamamoto, S. Tajima

Research output: Contribution to journalConference articlepeer-review

Abstract

We present an experimental study of the de Haas-van Alphen effect in single crystals of MgB2, using a piezo-resistive torque technique. Three quasi-particle orbits were observed. Two originate from a single warped Fermi surface tube along the c direction, and the third from a cylindrical section of an in-plane honeycomb network. The quasi-particle effective masses on these orbits were determined and compared to band structure calculations. From this we deduce that the electron-phonon coupling strength λ, is a factor ∼3 larger for the c-axis tube orbits than for the in-plane network orbit, in accord with recent microscopic calculations.

Original languageEnglish
Pages (from-to)105-106
Number of pages2
JournalPhysica C: Superconductivity and its applications
Volume388-389
DOIs
Publication statusPublished - 2003 May
Externally publishedYes
Eventproceedings of the 23rd international conference on low temper - Hiroshima, Japan
Duration: 2002 Aug 202002 Aug 27

Keywords

  • Fermi surface
  • MgB
  • Quantum oscillations

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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