Abstract
Within the charge-spin separation fermion-spin theory, the mechanism of superconductivity in Na x CoO 2·y H 2 O is studied. It is shown that dressed fermions interact occurring directly through the kinetic energy by exchanging magnetic excitations. This interaction leads to a net attractive force between dressed fermions(then the electron Cooper pairs), and their condensation reveals the superconducting ground state. The optimal superconducting transition temperature occurs in the electron doping concentration δ≈0.29, and then decreases for both underdoped and overdoped regimes, in qualitative agreement with the experimental results.
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Schedule a callMore From: International Journal of Modern Physics B [Condensed Matter Physics; Statistical Physics; Applied Physics]
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