Non-Phononic Mechanism of the Superconductivity in A15 Compounds

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概要

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• A non-phononic mechanism based on Geilikman's model is proposed for thesuperconductivity of the A15 compounds with high transition temperatures T.The band structure near the Fermi level e. in these compounds is characterized bycoexsistence of the very narrow f..-subbands called the 'd-bands' and otherwide bands called the 's-bands'. The Coulomb interaction t>etween the s- anad-electrons causes am indirect attractive interaction between the s-electrons viathe particle-hole pair excitation in the d-electron system. The superconductivityin the s-electron system forces the d-electrons to form Cooper pairs. The structuralphase transition redistributes the d-electrons to go away from 8F, being unfavour-able in the superconducting phase. This model can explain successfully the inter-ference of the superconductivity with the structural transition observed in V.Siand Nb.Sn.

• 社団法人日本物理学会の論文
• 1985-01-15

著者

• Kataoka Mitsuo

  The Research Institute For Iron Steel And Other Metals Tohoku University

• Kataoka Mitsuo

  The Research Institute For Iron Steel And Other Metals

関連論文

• Antisymmertric Spin Interaction in Metals
• Non-Phononic Mechanism of the Superconductivity in A15 Compounds
• Concentration Modulation and Stability of Long Period Superlattice in the Off-Stoichiometric Cu-Au Alloys
• Spin Waves in Systems with Long Period Helical Spin Density Waves Due to the Antisymmetric and Symmetric Exchange Interactions
• Critical Diffuse Scattering Due to the Cooperative Jahn-Teller Phase Transition
• Helical Spin Density Wave Due to Antisymmetric Exchange Interaction
• Theory of the Giant Magnetostriction in Fe_2TiO_4

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