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de Haas-van Alphen effect in single crystal MgB2.
- Source :
-
Physical review letters [Phys Rev Lett] 2002 May 27; Vol. 88 (21), pp. 217002. Date of Electronic Publication: 2002 May 10. - Publication Year :
- 2002
-
Abstract
- 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 approximately 3 larger for the c-axis tube orbits than for the in-plane network orbit, in accord with recent microscopic calculations.
Details
- Language :
- English
- ISSN :
- 0031-9007
- Volume :
- 88
- Issue :
- 21
- Database :
- MEDLINE
- Journal :
- Physical review letters
- Publication Type :
- Academic Journal
- Accession number :
- 12059494
- Full Text :
- https://doi.org/10.1103/PhysRevLett.88.217002