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Superconductivity: from Fröhlich to nonadiabatic theory. (English) Zbl 1018.82025

Summary: A new insight on superconductivity stemming from the nonadiabatic molecular vibration-electronic theory is presented. An elegant synthesis of apparently quite controversial ideas, contained in H. Fröhlich’s three famous papers is made leading to one-particle theory of superconductivity. The critical comment on two-particle theories (such as BCS theory) is added. In our theory the elementary excitations are identical with selfconsistent polarons. The condition for creation of a superconductive state is equivalent to that of creation of an insulator with several equienergetical ground states rising due to the crystal symmetry lowering. The essence of superconductivity is bound to the existence of microflows (tunneling) of atomic nuclei below \(T_c\). The carriers of current are charge density waves connected to the motion of the couples of electrons forming the resonant valence bonds. In addition to the known properties of superconductors recent experiments concerning the density of electron states near the Fermi surface are explained.

MSC:

82D55 Statistical mechanics of superconductors
82-01 Introductory exposition (textbooks, tutorial papers, etc.) pertaining to statistical mechanics
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