Effect of CuO chains on the local density of states in the vortex phase of YBa_2Cu_3O_7

Details Effect of CuO chains on the local density of states in the vortex phase of YBa_2Cu_3O_7 Effect of CuO chains on the local density of states in the vortex phase of YBa_2Cu_3O_7

2008-07-31

arxiv.org/abs/0808.0030v1

Supercond. Sci. Technol. 22 014005 (2009)

Physics

Condensed Matter

Superconductivity

Scientific paper

10.1088/0953-2048/22/1/014005

We examine the effects of the CuO chains on the density of states in the vortex phase in YBa_2Cu_3O_7, via a calculation based on the tight-binding proximity model. In this model, chain superconductivity results from single-electron hopping between the intrinsically-normal chains and intrinsically-superconducting CuO_2 planes. The calculations are based on self-consistent solutions of the Bogolyubov-de Gennes equations for a bilayer consisting of a single CuO_2 layer and a single CuO chain layer. We find that, in addition to the dispersing resonances found in single-layer models, the chains introduce a second set of dispersing resonances associated with the induced gap in the chain layer. These new resonances are highly anisotropic and distort the vortex core shape.

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