de Haas-van Alphen Effect in Single Crystal MgB2

A Carrington, JR Cooper, EA Yelland, NE Hussey, PJ Meeson, S Lee, H Yamamoto, S Tajima

Research output: Contribution to journalArticle (Academic Journal)

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.
Translated title of the contributionde Haas-van Alphen Effect in Single Crystal MgB2
Original languageEnglish
Pages (from-to)105-106
Number of pages2
JournalPhysica C: Superconductivity and its Applications
Volume388-389
DOIs
Publication statusPublished - 2003

Bibliographical note

Publisher: Elsevier

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