Year: 2008
Type: article
Abstract: We have measured transport properties as a function of temperature and pressure up to $30\phantom{\rule{0.3em}{0ex}}\mathrm{GPa}$ in the ${\mathrm{Na}}_{x}\mathrm{Co}{\mathrm{O}}_{2}$ system. For the $x=0.5$ sample, the transition temperature at $53\phantom{\rule{0.3em}{0ex}}\mathrm{K}$ 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 ${\mathrm{Na}}^{+}$ order.
Source: Physical Review B
Language: English
Field: Materials Science
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2055315500