Fig. 4: Local spectral function of the 1T-electrons for various values of hybridization strengths.
From: Heavy fermions vs doped Mott physics in heterogeneous Ta-dichalcogenide bilayers
Data for (a) V1 = 30 meV, (b) 60 meV, and (c) 100 meV and different temperatures. The data in the main panel are for CT = 1/2 (0.5 e), with the corresponding CT = 0 (1e) spectral functions in the insets. Upon increasing V1, at CT = 1/2 the spectrum evolves from a “peak + shoulder” structure to a pronounced “bonding/antibonding” feature. Correspondingly, at CT = 0 a coherent peak develops close to the Fermi energy for higher V1. While the T/H hybridization is at the origin of such resonances in the spectrum for high values of V1, that is not the case for lower values, where the zero-frequency peak can be attributed to a doped Mott insulator scenario.
