Determining the structure of the superconducting gap in Cu2O3 two-leg ladder materials

Article

关键词: 2-CHAIN HUBBARD-MODEL;    SPIN GAPS;   

DOI  :  10.1103/PhysRevB.55.R11985

来源: SCIE

【 摘 要 】

Superconductivity has been recently observed in Sr0.4Ca13.6Cu24O41.84 which contains quasi-one-dimensional Cu2O3 two-leg ladders. If, as suggested by some theories, the superconductivity arises from these two-leg ladders, it will be important to determine the structure of the superconducting gap. In particular, does the gap on a two-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 two-leg ladders.

【 授权许可】

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