Study of J-T effect on the self-energy of electrons in manganite systems

Abstract

We present here a theoretical study of the effect of Jahn-Teller(J-T) distortion on the self-energy of electrons in the CMR manganites. The model consists of the itinerant e g electrons distorted by J-T effect and the localized t 2 g core electrons carrying strong ferromagnetism due to Hund's rule. The phonon interacts with the e g electrons as well as the J-T distorted e g band. The electron Green's functions are calculated by Zubarev's technique. The electron self-energy which carries all the information of the model is calculated from the Green's function. The effect of J-T distortion, magnetism on the frequency and temperature dependent dynamic selfenergy is presented in this paper. The results are discussed.