Microscopic theory of Raman spectra of heavy fermion systems in the normal state

摘要: Abstract In this communication, we develop the microscopic theory of Raman spectra heavy fermion (HF) system in its normal state at low temperatures. The is described by Periodic Anderson Model along with coupling phonon to bare f-electrons as well hybridization between conduction band and f-electrons. Green's function self-energy are evaluated equations motion method Zubarev. spectral density (SDF) temperatures long wavelength limit. calculation depicts three active modes one which corresponds strongly renormalized value reduced frequency ω ˜ ( = / 0 ) around 0.57 denoted P ), other two frequencies 0.08 1 0.025 2 SDF. effect electron–phonon (EP) on excitation peaks investigated probe nature electronic states system.