Near doping-independent pocket area from an antinodal Fermi surface instability in underdoped high temperature superconductors

Details Near doping-independent pocket area from an antinodal Fermi surface instability in underdoped high temperature superconductors Near doping-independent pocket area from an antinodal Fermi surface instability in underdoped high temperature superconductors

2011-08-06

arxiv.org/abs/1108.1511v1

Physics

Condensed Matter

Superconductivity

4 pages

Scientific paper

Fermi surface models applied to the underdoped cuprates predict the small pocket area to be strongly dependent on doping whereas quantum oscillations in YBa2Cu3O6+x find precisely the opposite to be true; seemingly at odds with the Luttinger volume. We show that such behavior can be explained by an incommensurate antinodal Fermi surface nesting-type instability; further explaining the doping-dependent superstructures seen in cuprates using scanning tunneling microscopy. We develop a Fermi surface reconstruction scheme involving orthogonal density waves in two-dimensions and show that their incommensurate behavior requires momentum-dependent coupling. A co-operative modulation of the charge and bond-strength is therefore suggested.

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