Yelland, E A , Cooper, J R , Carrington, A , Hussey, N E , Meeson, P J , Lee, S , Yamamoto, A and Tajima, S (2002) de Haas-van Alphen effect in single crystal MgB2. Physical Review Letters, 88 (21).
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We report observations of quantum oscillations in single crystals of the high temperature superconductor MgB2 . Three de Haas-van Alphen frequencies are clearly resolved. Comparison with band structure calculations strongly suggests that two of these come from a single warped Fermi surface tube along the c direction, and that the third arises from cylindrical sections of an in-plane honeycomb network. The measured values of the effective mass range from (0.44-0.68)m(e) . By comparing these to calculated band masses, we find that the electron-phonon coupling strength lambda is a factor of similar to3 larger for the c-axis tube orbits than for the in-plane network orbit, in accord with recent microscopic calculations.
This is a Submitted version This version's date is: 27/5/2002 This item is not peer reviewed
https://repository.royalholloway.ac.uk/items/eb524f1d-5390-b9f5-62dc-1b683f109919/3/
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