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arXiv · 0704.3673

Superconducting gap variations induced by structural supermodulation in BSCCO

Brian M. Andersen·P. J. Hirschfeld·James A. Slezak
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Abstract

We discuss the possibility that the strain field introduced by the structural supermodulation in Bi-2212 and certain other cuprate materials may modulate the superconducting pairing interaction. We calculate the amplitude of this effect, visible in scanning tunneling spectroscopy experiments, and thereby relate a change in the local superconducting gap with the change in the local dopant displacements induced by the supermodulation. In principle, since this modulation is periodic, sufficiently accurate x-ray measurements or ab initio calculations should enable one to determine which atomic displacements enhance pairing and therefore T_c.

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Brian M. Andersen, P. J. Hirschfeld, James A. Slezak. 2007-04-27. Superconducting gap variations induced by structural supermodulation in BSCCO. https://doi.org/10.1103/physrevb.76.020507

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