Phys.org June 25, 2024
In recent experimental signatures of superconductivity close to 80 K in La3Ni2O7 under pressure, a zero-resistance was not observed. Researchers in China showed that the zero-resistance state does exist in single crystals of La3Ni2O7. They found that the system remained metallic under applied pressures, suggesting the absence of a metal–insulator transition proximate to the superconductivity. Analysis of the normal state T-linear resistance revealed a link between this strange-metal behaviour and superconductivity. This was in line with other classes of unconventional superconductors, including the cuprates and Fe-based superconductors. According to the researchers further investigations exploring the interplay of strange-metal behaviour and superconductivity, and possible competing electronic or structural phases, are essential to understand the mechanism of superconductivity in this system… read more. TECHNICAL ARTICLE
… a perfect superconducting transition near 66K with zero-resistance below 40 K are presented… Credit: Zhang et al.
Credit: Nature, 06 June 2024Â Â Â Â Â