Fermi pockets and correlation effects in underdoped YBa2Cu3O6.5

Details Fermi pockets and correlation effects in underdoped YBa2Cu3O6.5 Fermi pockets and correlation effects in underdoped YBa2Cu3O6.5

2007-06-28

arxiv.org/abs/0706.4276v2

Phys. Rev. B 77, 060504(R) (2008).

Physics

Condensed Matter

Strongly Correlated Electrons

A high-resolution version can be found at http://www.physics.ubc.ca/~quantmat/ARPES/PUBLICATIONS/Articles/YBCO_OrthoII_LDA.pdf

Scientific paper

10.1103/PhysRevB.77.060504

The detection of quantum oscillations in the electrical resistivity of YBa2Cu3O6.5 provides direct evidence for the existence of Fermi surface pockets in an underdoped cuprate. We present a theoretical study of the electronic structure of YBa2Cu3O7-d (YBCO) aiming at establishing the nature of these Fermi pockets, i.e. CuO2 plane versus CuO chain or BaO. We argue that electron correlation effects, such as orbital-dependent band distortions and highly anisotropic self-energy corrections, must be taken into account in order to properly interpret the quantum oscillation experiments.

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