Measurements were made of the de Haas-van Alphen effect for single crystals in magnetic fields up to 32T. In contrast to earlier work, de Haas-van Alphen dHvA orbits from all 4 sheets of the Fermi surface were detected. The results were in good overall agreement with calculations of the electronic structure and the electron-phonon mass enhancements of the various orbits, but there were some small quantitative discrepancies. In particular, systematic differences in the relative volumes of the Fermi-surface sheets and the magnitudes of the electron-phonon coupling constants could be large enough to affect detailed calculations of TC and other superconducting properties.

Determination of the Fermi Surface of MgB2 by the De Haas-Van Alphen Effect. A.Carrington, P.J.Meeson, J.R.Cooper, L.Balicas, N.E.Hussey, E.A.Yelland, S.Lee, A.Yamamoto, S.Tajima, S.M.Kazakov, J.Karpinski: Physical Review Letters, 2003, 91[3], 037003 (3pp)