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The antiferromagnetic-metal phase with orthorhombic structure at 0.00 $\\le$ $x$ $\\le$ 0.020 is driven to a superconducting phase with uncollapsed-tetragonal (ucT) structure at 0.020 $\\le$ $x$ $\\le$ 0.024; a non-superconducting collapsed-tetragonal (cT) phase takes over at $x$ $\\geq$ 0.024. The breakdown of Fermi-liquid transport is observed in the ucT phase above $T_{\\rm c}$. 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