Methods of the Many-Body Theory in Superconductivity
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The discovery of superconductivity by Kamerlingh Onnes in 1911 was a real challenge for contemporary physical theory. The theory of metals developed by Drude on the basis of classical statistical physics, while giving a very good explanation of their normal properties, was absolutely unable to deal with superconducting ones. This was also true later for Sommerfeld’s and Bloch’s theories, based on quantum mechanics. It took almost a half century of studies for the microscopic theory of this phenomenon to appear. (One of the boldest sci-fi writers, R. Heinlein, in a novel written in the mid-40s, predicted the creation of such a theory only by the middle of the next millenium.)
KeywordsFermi Surface Cooper Pair Elementary Excitation Mean Field Approximation Andreev Reflection
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