Revised phase diagram of a high-$T_c$ cuprate superconductor revealed by anisotropic transport measurements
2021
The phase diagram of high transition temperature (high-$T_c$) cuprates is elucidated via systematic anisotropic transport measurements for Pb-doped Bi-2212 single crystals. We demonstrate that the onset temperatures of the ``weak'' pseudogap and electronic coherence cross each other at a critical doping level, while the onset of the ``strong'' pseudogap merges into that of superconducting fluctuations above the critical doping level. These results indicate the importance of Mottness in high-$T_c$ superconductivity.
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