Unconventional Superconductor, Kartoniert / Broschiert

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Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Unconventional superconductors are materials that display superconductivity which does not conform to either the conventional BCS theory or the Nikolay Bogolyubov's theory or its extensions. The first unconventional singlet d-wave supeconductor, CeCu2Si2, a type of heavy fermion metal, was discovered in 1978 by Frank Steglich. In the early eighties, many more unconventional, heavy fermion superconductors were discovered, including UBe13, UPt3 and URu2Si2. In each of these materials, the anisotropic nature of the pairing is implicated by the power-law dependence of the nuclear magnetic resonance (NMR) relaxation rate and specific heat capacity on temperature. The presence of nodes in the superconducting gap of UPt3 was confirmed in 1986 from the polarization dependence of the ultrasound attenuation.