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Title: Study of ultrasonic attenuation in f-electron systems in the paramagnetic limit of Coulomb interaction

We report here a microscopic model study of ultrasonic attenuation in f-electron systems based on Periodic Anderson Model in which Coulomb interaction is considered within a mean-field approximation for a weak interaction. The Phonon is coupled to the conduction band and f-electrons. The phonon Green's function is calculated by Zubarev's technique of the Green's function method. The temperature dependent ultrasonic attenuation co-efficient is calculated from the imaginary part of the phonon self-energy in the dynamic and long wave length limit. The f-electron occupation number is calculated self-consistently in paramagnetic limit of Coulomb interaction. The effect of the Coulomb interaction on ultrasonic attenuation is studied by varying the phonon coupling parameters to the conduction and f-electrons, hybridization strength, the position of f-level and the Coulomb interaction Strength. Results are discussed on the basis of experimental results.
Authors:
 [1] ;  [2]
  1. RamajeeMahavidyalaya, Bhismagiri-761055, Odisha,India (India)
  2. School of Applied Sciences (Physics), KIIT University, Bbhubaneswar-751024, Odisha (India)
Publication Date:
OSTI Identifier:
22391773
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1661; Journal Issue: 1; Conference: ICCMP 2014: International Conference on Condensed Matter Physics 2014, Shimla (India), 4-6 Nov 2014; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; APPROXIMATIONS; ATTENUATION; BAND THEORY; COULOMB FIELD; COUPLING; ELECTRIC CONDUCTIVITY; ELECTRONS; GREEN FUNCTION; MEAN-FIELD THEORY; OCCUPATION NUMBER; PARAMAGNETISM; PERIODICITY; PHONONS; SELF-ENERGY; TEMPERATURE DEPENDENCE; ULTRASONIC WAVES