$t-J$ model one-electron renormalizations: high energy features in photoemission experiments of high-$T_c$ cuprates

摘要

Recent angle-resolved photoemission experiments in hole doped cupratesreported new and interesting high energy features which may be useful forunderstanding the electronic properties of these materials. Using aperturbative approach, which allows the calculation of dynamical properties inthe $t-J$ model, one-electron spectral properties were calculated. A stronglyrenormalized quasiparticle band near the Fermi surface and incoherent spectraat high energy were obtained. Among different current experimentalinterpretations, the obtained results are closer to the interpretation given byPan {\it et al.}\cite{pan}. The self-energy shows large high energycontributions which are responsible for the incoherent structures showed by thespectral functions and the reduction of the quasiparticle weight and bandwidth.According to the calculation, collective charge fluctuations are the mainsource for the self-energy renormalizations. For testing if the obtainedself-energy is compatible with transport measurement the resistivity versustemperature was estimated.