Joint density of states and its relationship with quasiparticle interference pattern of d-wave superconductors

Details Joint density of states and its relationship with quasiparticle interference pattern of d-wave superconductors Joint density of states and its relationship with quasiparticle interference pattern of d-wave superconductors

2011-03-02

arxiv.org/abs/1103.0345v2

Physics

Condensed Matter

Superconductivity

4 pages, 3 figures; minor changes made

Scientific paper

We present analytic analyses for the joint density of states (JDOS) and the elastic scattering susceptibility (ESS) for d-wave superconductors under the linear dispersion approximation. The profile of the JDOS, determined by the curves on which the JDOS diverges, is found to be the envelope function related to the contour of constant energy of the Bogoliubov quasiparticles. We derive the explicit form of the envelope functions. The intrinsic relationship of the JDOS patten and the octet model of ESS is clearly revealed. It is also found that apexes of the envelope function coincide with the octet vectors when the Dirac-cone anisotropy is strong, which is relevant to the d-wave cuprates.

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