Quantum oscillations of ortho-II YBa_2Cu_3O_6.5

Details Quantum oscillations of ortho-II YBa_2Cu_3O_6.5 Quantum oscillations of ortho-II YBa_2Cu_3O_6.5

2008-05-30

arxiv.org/abs/0806.0005v2

Phys. Rev. B 78, 224516 (2008)

Physics

Condensed Matter

Superconductivity

5 pages, 5 figures

Scientific paper

Motivated by quantum oscillations observed in highly ordered ortho-II YBa_2Cu_3O_6.5, we study the Fermi surface topology of d-density wave (ddw) or antiferromagnetic (AF) ordering in the presence of the ortho-II potential. We find that the electron pocket is unaffected by the presence of the ortho-II potential. This further strengthens the proposal that quantum oscillations observed in ortho-II-free YBa_2Cu_4O_8 arise from an electron pocket. On the other hand, the hole pocket topology is sensitive to the ortho-II potential. We show there exist generically three distinct quantum oscillations associated with one electron-like and two hole-like Fermi pockets. We compare our results to the quantum oscillations observed in experiments. We discuss possible ways to distinguish between ddw and antiferromagnetic orders in a potential single-layer ortho-II material.

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