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Multiple Quantum Oscillations in the de Haas van Alphen Spectra of the Underdoped High Temperature Superconductor YBa_2Cu_3O_6.5
- Source :
- Phys. Rev. Lett. 103, 157003 (2009)
- Publication Year :
- 2008
-
Abstract
- By improving the experimental conditions and extensive data accumulation, we have achieved very high-precision in the measurements of the de Haas-van Alphen effect in the underdoped high-temperature superconductor YBa$_{2}$Cu$_{3}$O$_{6.5}$. We find that the main oscillation, so far believed to be single-frequency, is composed of three closely spaced frequencies. We attribute this to bilayer splitting and warping of a single quasi-2D Fermi surface, indicating that \emph{c}-axis coherence is restored at low temperature in underdoped cuprates. Our results do not support the existence of a larger frequency of the order of 1650 T reported recently in the same compound [S.E. Sebastian {\it et al}., Nature {\bf 454}, 200 (2008)].
Details
- Database :
- arXiv
- Journal :
- Phys. Rev. Lett. 103, 157003 (2009)
- Publication Type :
- Report
- Accession number :
- edsarx.0812.0458
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1103/PhysRevLett.103.157003