Quantum oscillations and the Fermi surface in an underdoped high-Tc superconductor

@article{DoironLeyraud2007QuantumOA,
  title={Quantum oscillations and the Fermi surface in an underdoped high-Tc superconductor},
  author={Nicolas Doiron-Leyraud and Cyril Proust and David Leboeuf and Julien Levallois and J.-B. Bonnemaison and Ruixing Liang and Douglas A. Bonn and W. N. Hardy and Louis Taillefer},
  journal={Nature},
  year={2007},
  volume={447},
  pages={565-568}
}
Despite twenty years of research, the phase diagram of high-transition-temperature superconductors remains enigmatic. A central issue is the origin of the differences in the physical properties of these copper oxides doped to opposite sides of the superconducting region. In the overdoped regime, the material behaves as a reasonably conventional metal, with a large Fermi surface. The underdoped regime, however, is highly anomalous and appears to have no coherent Fermi surface, but only… 

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