Table 1 The relationship between magnetic exchange and superconducting condensation energies in unconventional superconductors.16,17,18,19,20,21.

From: High-energy magnetic excitations from heavy quasiparticles in CeCu2Si2

 

YBa2Cu3O6.95

CeCoIn5

CeCu2Si2

Ba0.67K0.33Fe2As2

Fe1+δTe1−xSex (x ≈ 0.5)

NaFe0.9785Co0.0215As

\(\frac{{{\Delta }}{E}_{{\rm{mag}}}}{{{\Delta }}{E}_{{\rm{SC}}}}\)

≈16

≈35

≈21

≈7

≈24

≈26

  1. Published ratios of the reduction in magnetic exchange energy in the superconducting state ΔEmag with the superconducting condensation energy ΔEsc, for cuprate, iron-based, and heavy fermion unconventional superconductors.
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