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Cuprate high-Tc superconductors

19 August 2008
Kyle M. Sheen and J.C. Seamus Davis

In solid-state physics two different paradigms are typically applied. The first is a local picture, in which one visualizes the quantum states of electrons in atomic orbitals or at impurity atoms in real space (r-space). The second is the momentum or reciprocal space (k-space) picture, where electrons are viewed as de Broglie waves completely delocalized throughout the material.

The classic Bardeen–Cooper–Schrieffer (BCS) theory of superconductivity from 1957 is founded upon the k-space paradigm. Here attractive electron–electron interactions between states of opposite spin and k result in the formation of Cooper pairs – spin-zero bound states of the two electrons.....

 

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Electronic materials  •  Magnetic materials  •  Mechanical properties