Extended Data Fig. 4: Superconductivity and the upper critical field.
From: Pressure induced superconductivity in hybrid Ruddlesden‒Popper La5Ni3O11 single crystals
(a) R(T) curves for La5Ni3O11 (S3) at 18.2 GPa under various magnetic fields along the c-axis direction. The onset Tc is quickly suppressed to a lower temperature with increasing magnetic field. (b) The upper critical field extracted with different criteria in (a), where the RN is the resistance at the normal state. There is an obvious positive curvature in the Hc2-Tc curve. The upper critical field at the zero-temperature limit is fitted via the two-band model at the clean limit.