Quantum Oscillations in the Underdoped Cuprate YBa2Cu4O8

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We report the observation of quantum oscillations in the underdoped cuprate superconductor YBa2Cu4O8 using a tunnel-diode oscillator technique in pulsed magnetic fields up to 85T. There is a clear signal, periodic in inverse field, with frequency 660+/-15T and possible evidence for the presence of two components of slightly different frequency. The quasiparticle mass is m*=3.0+/-0.3m_e. In conjunction with the results of Doiron-Leyraud et al. for YBa2Cu3O6.5, the present measurements suggest that Fermi surface pockets are a general feature of underdoped copper oxide planes and provide information about the doping dependence of the Fermi surface.
Contains revisions addressing referees' comments including a different Fig 1b. 4 pages, 4 figures

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Superconductivity, Strongly Correlated Electrons

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http://salesiana.dossiersoluciones.com/handle/123456789/153906

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/0707.0057
 http://arxiv.org/abs/0707.0057
 Phys. Rev. Lett. 100, 047003 (2008)
 doi:10.1103/PhysRevLett.100.047003

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arXiv