Fermi-surface pockets in magnetic underdoped cuprates from first principles

Details Fermi-surface pockets in magnetic underdoped cuprates from first principles Fermi-surface pockets in magnetic underdoped cuprates from first principles

2009-02-22

arxiv.org/abs/0902.3809v1

Europhys. Lett. 88, 67009 (2009)

Physics

Condensed Matter

Superconductivity

4 pages, 4 figures

Scientific paper

Using an innovative first-principles band theory enabling the exploration of Mott-insulating magnetic cuprates, we study the Fermi surface of underdoped Y$_{1-x}$Ca$_x$Ba$_2$Cu$_3$O$_6$ in a selection of magnetically ordered and polaronic states. All phases exhibit qualitatively similar, hole-like nodal-point small pockets. Their properties (area, masses, mass sign) only partially match those extracted from recent quantum-oscillation experiments. Ab initio calculations, therefore, do not straightforwardly support a magnetic origin of quantum oscillations.

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