Checkerboard superconducting order and antinodal Bogoliubov quasiparticle interference

Details Checkerboard superconducting order and antinodal Bogoliubov quasiparticle interference Checkerboard superconducting order and antinodal Bogoliubov quasiparticle interference

2009-10-16

arxiv.org/abs/0910.3172v1

Physics

Condensed Matter

Superconductivity

9 pages, 6 figes

Scientific paper

Numerical study of momentum-dependent gap function is presented to make clear the origin of superconductivity in copper oxides. We claim that antinodal region with pronounced nesting feature of the Fermi contour gives rise to superconducting pairing with large momentum under screened Coulomb repulsion. Such a pairing results in both spatial checkerboard pattern of the superconducting state below Tc and a gapped state of incoherent pairs in a broad temperature range above Tc. We explain the momentum dependence of the coherent spectral weight detected in angle-resolved photoemission spectroscopy and predict antinodal Bogoliubov quasiparticle interference other than observed in the nodal region.

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