Abstract
We propose a novel mechanism of superconductivity in MgB2 based on the dynamic Jahn-Teller interactions between the doubly degenerate pσ electronic states and the E2g phonon modes. The hopping motion of holes in the pσ states of the 2D B layers is constrained by accompanying phonons, and thereby a non-trivial superconducting state with multiple order parameters is found to arise from conventional electron–phonon interactions due to the presence of additional pairing channels.
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