Phonon Frequency Spectrum and Lattice Dynamics and Normal Coordinate Analysis of HTSC Tl2Ca2Ba2Cu3O10

Abstract

The lattice dynamics of the high temperature superconductors Tl₂Ca₂Ba₂Cu₃O₁₀ has been investigated on the basis of the three body force shell model (TSM).  The various interactions between ions are treated on a general way without making them numerically equal.  The phonon frequency at the zone centre of Brillouin  zone are presented and the vibrational assignments are discussed.  Further the normal coordinate calculation has also been employed to study the vibrational analysis of this compound.  The normal coordinate analysis of the superconductor Tl₂CaBa₂Cu₂O₈ has been calculated by using Wilson’s F-G matrix method which is useful for the confirmation of our present investigation.  The vibrational frequencies and the potential energy distribution (PED) of the optically active phonon modes are also presented.

DOI: 10.7176/APTA/80-04

Publication date:October 31^st 2019