Unity in the Diversity
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The Superstripes 2008 conference has been focused on the discovery of the amplification of the superconducting critical temperature Tc in a novel realization (iron pnictides) of metallic heterostructures at the atomic limit called superstripes. These are formed by superlattices of superconducting units (layers, or stripes, or wires, or spheres or balls) separated by an intercalated material. Superstripes show multiband high Tc superconductivity driven by the shape resonance or Feshbach resonance in the interband pairing that occurs by tuning the chemical potential at an electronic topological transition where the Fermi surface topology of one of the bands changes its dimensionality. The maximum Tc amplification is reached by tuning the chemical potential to “shape resonance” by changing: the charge density and/or the superlattice structural parameters.
KeywordsMultiband superconductivity Feshbach resonance Shape resonance Iron pnictides
- 6.Bianconi, A.: Process of increasing the critical temperature T c of a bulk superconductor by making metal heterostructures at the atomic limit. United States Patent No.:US6,265,019B1, July 24, 2001 Google Scholar