Determining the structure of the superconducting gap in Cu 2 O 3 2 – leg ladder materials
نویسندگان
چکیده
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 on 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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