Fig. 3: Strong correlated EHP phases in BP.
From: Quantum criticality of excitonic Mott metal-insulator transitions in black phosphorus
a Spectral phase diagram in temperature and e–h pair density space for correlated electron–hole states. In the high-temperature regime, three regions are defined by the characteristics of absorption/gain spectra, where EG, IM, and EHP denote the exciton gas (red), intermediate metal (green), electron–hole plasma (blue) phases, respectively. The boundaries are shown in dashed lines. The shaded area indicates the inaccessible region in the temperature and e–h pair density space. b Spectra of phase evolution as a function of e–h pair densities for various T marked in a, showing the spectral features at different phase transition. The dashed lines indicate the boundaries of EG (red) and EHP (blue) phases. Source data are provided as a Source Data file.
