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Kinetic Energy Driven Superconductivity in the Electron Doped Cobaltate Na <sub> <i>x</i> </sub> CoO <sub>2</sub> · <i>y</i> H <sub>2</sub> O
Within the charge-spin separation fermion-spin theory, we have shown that the mechanism of superconductivity in the electron doped cobaltate NaxCoO2 • yH2O is ascribed to its kinetic energy.The dressed fermions interact occurring directly through the kinetic energy by exchanging magnetic excitations.This interaction leads to a net attractive force between dressed …