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The s-d theory turns 5
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In June 2003, our paper Superconductivity of overdoped cuprates: the modern face of the ancestral two-electron exchange appeared in J. Phys.: Condens. Matter.
Extending an earlier announcement in Int. J. Mod. Phys B, we have shown that the single-site two-electron exchange amplitude Jsd between the Cu 4s and Cu 3dx^2-y^2 states is the pairing mechanism of high-Tc overdoped cuprates. The animation illustrates the classical
Bohr–Sommerfeld representation of the s–d two-electron exchange process and the diagram shows how
the Coulomb scattering leads to an effective electron spin exchange.
We have been advocating that this pairing mechanism is universal - the same for both overdoped and underdoped cuprates... or, perchance, for FeAs-based materials, too?
The s-d theory turns 5
