2016/12/21 by Jinhuan Jiang, Jiang, Jinhuan
Chemistry · Physics and Astronomy · #Advanced Physical and Chemical Molecular Interactions #FOS: Physical sciences #Physics of Superconductivity and Magnetism #Superconductivity (cond-mat.supr-con) #Surface and Thin Film Phenomena
paper · pdf · doi:10.48550/arxiv.1612.07079
openalex publication_date 2016/12/21 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
In this paper, a microscopic theory of magnetic-interaction-induced pairing in superconductivity of metals was developed on the basis of four idealized assumptions: (1) only a small number of electrons are involved in superconductivity; (2) magnetic interactions between electron spins lead to superconductivity; (3) there are different electronic states, i.e., doubly-occupied, singly-occupied (spin up or down) and empty states; (4) the average kinetic energy of electrons complies with the equipartition theorem of energy. A formula to estimate TC was thus derived. It was found that, TC is not only related to the electron density and the critical magnetic field, but also to the degrees of freedom of electrons. The TC values calculated from this formula are in good agreement with the experimental results for most metals. According to this theory, TC generally increases with decreasing dimension of metals. For example, TC in the 3-dimensional (3D) Al metal is 1.19K, but increases to 1.46K in 2D and 2.06K in 1D.