Equation 2 · From Origins to Frontier: A History of Quantum and Condensed-Matter Systems
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Symbol N
N is a part of this expression. Its role is fixed by the surrounding article and by the operations shown in the formula.
Symbol V
V is a part of this expression. Its role is fixed by the surrounding article and by the operations shown in the formula.
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What the article says around this equation
BCS theory gives condensed-matter physics one of its few genuinely load-bearing equations, and it is worth writing down because it exposes a real, falsifiable assumption rather than decorating the prose. In the weak-coupling limit, the transition temperature is related to the strength of the electron-phonon coupling N(0)V (density of states at the Fermi level times the pairing interaction) and the characteristic phonon energy (the Debye frequency) by:
Sources cited in the article section
- [2] Theory of Superconductivity ↗
- [3] July 1957: Bardeen, Cooper, and Schrieffer submit their paper, 'Theory of Superconductivity' ↗
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