Weak temperature dependence of angle-resolved photoemission within the periodic Anderson model

Within the framework of the periodic Anderson model, we have studied the angle-resolved photoemission spectroscopy of heavy-fermion systems by using the non-crossing approximation for lattice introduced by Grewe. It is found that the spectroscopy is weak temperature-dependent as well as dispersive at T>10 TK, which is in qualitative agreement with the experiments on single-crystalline samples.