Volume 82, Number 1, April 2008
|Number of page(s)||5|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||12 March 2008|
Quantum oscillations in magnetic-field–induced antiferromagnetic phase of underdoped cuprates: Application to ortho-II YBa2Cu3O6.5
Department of Physics and Center of Theoretical and Computational Physics, University of Hong Kong Hong Kong, China
2 Institut für Theoretische Physik, ETH-Zürich - CH-8093 Zürich, Switzerland
Accepted: 8 February 2008
The magnetic-field–induced antiferromagnetic phase of the underdoped cuprates is studied within the t - t′ - J model. A magnetic field suppresses the pairing amplitude, which, in turn, may induce antiferromagnetism. We apply our theory to interpret the recently reported quantum oscillations in high magnetic field in ortho-II YBa2Cu3O6.5 (Doiron-Leyraud N. et al., Nature, 447 (2007) 565) and propose that the total hole density abstracted from the oscillation period is reduced by 50% due to doubling of the unit cell.
PACS: 74.20.Mn – Nonconventional mechanisms (spin fluctuations, polarons and bipolarons, resonating valence bond model, anyon mechanism, marginal Fermi liquid, Luttinger liquid, etc.) / 74.20.-z – Theories and models of superconducting state / 74.72.-h – Cuprate superconductors (high-Tc and insulating parent compounds)
© EPLA, 2008
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