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Title: The effect of external magnetic field on the Raman peaks in manganites

We report here a microscopic theoretical model study exhibiting the effect of external magnetic field on the Raman excitation peaks in the CMR manganite system. The Hamiltonian consists of Jahn-Teller (J-T) distortion in e{sub g} band, the double exchange interaction and the Heisenberg spin-spin interaction. Further the phonons are coupled to e{sub g} band electrons, J-T distorted e{sub g} band and the double exchange interaction. The Raman spectral intensity is calculated from the imaginary part of the phonon Green function. The spectra exhibits three peaks besides a very weak high energy peak. The magnetic field effect on these peaks are reported.
Authors:
 [1] ;  [2]
  1. Seemanta Engineering College, Jharpokharia, Mayurbhanj-757086, Odisha (India)
  2. School of Applied Sciences (Physics), KIIT University, Bhubaneswar-7561024 (India)
Publication Date:
OSTI Identifier:
22269364
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1591; Journal Issue: 1; Conference: 58. DAE solid state physics symposium 2013, Patiala, Punjab (India), 17-21 Dec 2013; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; EXCHANGE INTERACTIONS; EXCITATION; GREEN FUNCTION; HAMILTONIANS; JAHN-TELLER EFFECT; J-J COUPLING; MAGNETIC FIELDS; PEAKS; PHONONS; SPECTRA