Fig. 4: Magnetic-field tuned phase diagram of Ce3Bi4Pd3.
From: Control of electronic topology in a strongly correlated electron system
a Temperature-magnetic field phase diagram with the crossover temperatures \({T}_{1}^{*}\) and \({T}_{2}^{*}\) (from Fig. 2c), the temperature scales TC/T, \({T}_{{{{{{{{\rm{H}}}}}}}}}^{{{{{{{{\rm{even}}}}}}}}}\), and \({T}_{{{{{{{{\rm{H}}}}}}}}}^{{{{{{{{\rm{odd}}}}}}}}}\) (all from Fig. 1) associated with the Weyl-Kondo semimetal phase, the characteristic scales Tτ of the torque signal and TFL of Fermi liquid behavior (both from Fig. 3) (all left axis). The inverse A coefficient (from Fig. 3) is plotted on the right axis, indicating an effective mass divergence at Bc2. b Effective charge carrier concentration in a single-band model, \(n=1/(\tilde{R}e)\), at the lowest temperature of 0.5 K (from Fig. 2d), in the three different magnetic field ranges. c Axis across a theoretical zero-temperature phase diagram. A topological quantum phase transition between a Weyl-Kondo semimetal (WKSM) and a phase with annihilated and thus gapped-out Weyl nodes (Δ) occurs at Bc1. The underlying Kondo insulator gap persists across both the WKSM and the Δ phase, and is quenched only at a quantum critical point at Bc2 to reach a heavy fermion (HF) metal phase at high fields.
