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. 2008 May 9;100(18):187005.
doi: 10.1103/PhysRevLett.100.187005. Epub 2008 May 8.

de Haas-van Alphen oscillations in the underdoped high-temperature superconductor YBa2Cu3O6.5

Cyril Jaudet  1 , David Vignolles, Alain Audouard, Julien Levallois, D LeBoeuf, Nicolas Doiron-Leyraud, B Vignolle, M Nardone, A Zitouni, Ruixing Liang, D A Bonn, W N Hardy, Louis Taillefer, Cyril Proust
Affiliations

de Haas-van Alphen oscillations in the underdoped high-temperature superconductor YBa2Cu3O6.5

Cyril Jaudet et al. Phys Rev Lett. .

Abstract

The de Haas-van Alphen effect was observed in the underdoped cuprate YBa2Cu3O6.5 via a torque technique in pulsed magnetic fields up to 59 T. Above a field of approximately 30 T the magnetization exhibits clear quantum oscillations with a single frequency of 540 T and a cyclotron mass of 1.76 times the free electron mass, in excellent agreement with previously observed Shubnikov-de Haas oscillations. The oscillations obey the standard Lifshitz-Kosevich formula of Fermi-liquid theory. This thermodynamic observation of quantum oscillations confirms the existence of a well-defined, closed, and coherent, Fermi surface in the pseudogap phase of cuprates.

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