Journal
PHYSICAL REVIEW B
Volume 77, Issue 6, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.77.064105
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We have measured transport properties as a function of temperature and pressure up to 30 GPa in the NaxCoO2 system. For the x=0.5 sample, the transition temperature at 53 K increases with pressure, while paradoxically the sample passes from an insulating state to a metallic ground state. Compression on the x=0.75 sample transforms the sample from a metallic state to an insulating state. We discuss our results in terms of interactions between band structure effects and Na+ order.
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