Fig. 3: Emergence of the anomalous Hall effect upon the disappearance of the first superconducting state and its coexistence within the reentrant superconducting state.
Hall resistance (Rxy) at different pressures: \(P=0\) GPa (a), 1.0 GPa (b), 1.63 GPa (c), and 2.3 GPa (e), plotted as a function of the magnetic field with fields oriented perpendicularly to the bc-plane. In (a, b), Rxy shows a linear response as a function of the field, displaying no anomalous Hall effect. However, at \(P=1.63\) GPa (c) and 2.3 GPa (e), along with a reasonably linear Hall effect, an anomalous component emerges at low fields. Anomalous Hall resistance, \({R}_{{xy}}^{{AHE}}\), obtained after subtracting the linear-in-field component of Rxy, plotted as a function of magnetic field for \(P=1.63\) GPa (d) and 2.3 GPa (f). Superconductivity is absent at \(P=1.63\) GPa where the anomalous Hall effect is more pronounced. Conversely, in the reentrant superconducting state at 2.3 GPa, superconductivity coexists with the relatively subdued anomalous Hall effect. All the data were acquired at \(T=10\) K. Source data are provided as a Source Data file.
