Temperature Dependent Gap Anisotropy from Interlayer Tunneling
Abstract
A recent experiment by Ma and collaborators shows that the gap anisotropy in Bi2 Sr2 Ca1 Cu2 O8+x is strongly temperature dependent. In particular, the superconducting gap along the Γ- M direction shows a weaker temperature dependence than the gap along the Γ- X direction which decreases rapidly with temperature. We explain this novel feature as a natural consequence of the interlayer tunneling mechanism of superconductivity.
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