Determining the structure of the superconducting gap in Cu_{2}O_{3} 2-leg ladder materials

Details Determining the structure of the superconducting gap in Cu_{2}O_{3} 2-leg ladder materials Determining the structure of the superconducting gap in Cu_{2}O_{3} 2-leg ladder materials

1996-09-14

arxiv.org/abs/cond-mat/9609127v1

Physics

Condensed Matter

12 pages including 7 eps figures, uses revtex with epsf

Scientific paper

10.1103/PhysRevB.55.R11985

Superconductivity has been recently observed in Sr_{0.4}Ca_{13.6}Cu_{24}O_{41.84} which contains quasi-one-dimensional Cu_{2}O_{3} 2-leg ladders. If, as suggested by some theories, the superconductivity arises from these 2-leg ladders, it will be important to determine the structure of the superconducting gap. In particular, does the gap in a 2-leg ladder change sign when one goes from the bonding to antibonding fermi surface points? Here we carry out phenomenological calculations of nuclear relaxation rates and inelastic neutron scattering intensity in order to provide estimates of the experimental resolution that will be required to determine the structure of the superconducting gap associated with an array of weakly coupled 2-leg ladders.

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