Publication year: 2011 Source: Synthetic Metals, Available online 15 September 2011 Takashi Kato The essential role of the phonon- and photon-coupled interactions in the electron pairing in the macroscopic sized conventional superconductivity is investigated by comparing the conventional superconductivity in the macroscopic sized materials with the nondissipative diamagnetic currents in the negatively charged small sized molecules such as cyclopentadiene monoanion (5an) and cyclobutadiene dianion (4an). The nondissipative diamagnetic currents in the negatively charged small sized molecules such as5anand4ancannot be explained by the Bardeen–Cooper–Schrieffer (BCS) theory because attractive phonon-coupled interactions between two electrons (V6π,N,BCS,phonon,e–e) are zero and direct electron–electron repulsion (V6π,N,BCS,repulsive,e–e) becomes very large
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The role of phonon- and photon-coupled interactions in electron pairing in solid state materials