Electron pockets and pseudogap Dirac point in underdoped cuprate superconductors

Details Electron pockets and pseudogap Dirac point in underdoped cuprate superconductors Electron pockets and pseudogap Dirac point in underdoped cuprate superconductors

2011-07-27

arxiv.org/abs/1107.5503v1

EPL, 95, 47008 (2011)

Physics

Condensed Matter

Superconductivity

6 pages, 5 figures, published in EPL

Scientific paper

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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