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arXiv · 1107.5503

Electron pockets and pseudogap Dirac point in underdoped cuprate superconductors

K. A. G. Fisher·E. J. Nicol·J. P. Carbotte
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Abstract

We consider a model of the pseudogap specifically designed to describe the underdoped cuprates and which exhibits particle-hole asymmetry. The presence of electron pockets, besides the usual hole pockets, leads to the appearance of new vectors beyond the usual so-called octet model in the joint density of states (JDOS), which underlies the analysis of Fourier-transform scanning tunneling spectroscopy (FT-STS) data. These new vectors are associated with distinct patterns of large amplitude in the JDOS and are expected to occur primarily at positive bias. Likewise a pseudogap Dirac point occurs at positive bias and this point can be determined either through FT-STS or through extrapolation of data from the autocorrelation function of angle-resolved photoemission spectroscopy.

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K. A. G. Fisher, E. J. Nicol, J. P. Carbotte. 2011-07-27. Electron pockets and pseudogap Dirac point in underdoped cuprate superconductors. https://doi.org/10.1209/0295-5075%2F95%2F47008

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