Diffusion Process Of Phonons Through The Crystalline Structures

Jovan P Šetrajčić; Stevo K Jaćimovski; Dušan I Ilić

doi:10.5937/nabepo22-13580

Jovan P Šetrajčić University of Novi Sad, Faculty of Sciences, Department of Physics
Stevo K Jaćimovski Academy of Criminalistic and Police Studies, Belgrade
Dušan I Ilić University of Novi Sad, Faculty of Technical Sciences

DOI: https://doi.org/10.5937/nabepo22-13580

Abstract

Instead of usual approach, applying displacement-displacement Green's functions, the momentum-momentum Green's functions will be used to calculate the diffusion tensor. These functions enter into Kubo's formula defining diffusion properties of the system. Calculation of the diffusion tensor requires solving of the system of difference equations. It is shown that the elements of the diffusion tensor express discrete behaviour of the dispersion law of elementary excitations and, more important - that they are temperature independent.

Author Biographies

Jovan P Šetrajčić, University of Novi Sad, Faculty of Sciences, Department of Physics

Academician, Full Professor

Stevo K Jaćimovski, Academy of Criminalistic and Police Studies, Belgrade

Associate Professor, Senior Research Assistant

Dušan I Ilić, University of Novi Sad, Faculty of Technical Sciences

Department of Fundamentals Sciences, Chair of Physics, Assistant professor

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