Vibrational properties of phonons in random binary alloys: An augmented space recursive technique in the k-representation

Abstract

We present here an augmented space recursive technique in the k-representation which include diagonal, off-diagonal and the environmental disorder explicitly : an analytic, translationally invariant, multiple scattering theory for phonons in random binary alloys.We propose the augmented space recursion (ASR) as a computationally fast and accurate technique which will incorporate configuration fluctuations over a large local environment. We apply the formalism to $N{i}_{55}P{d}_{45}$, $Ni_{88}Cr_12}$ and $N{i}_{50}P{t}_{50}$ alloys which is not a random choice. Numerical results on spectral functions, coherent structure factors, dispersion curves and disordered induced FWHM's are presented. Finally the results are compared with the recent itinerant coherent potential approximation (ICPA) and also with experiments.

20 pages, LaTeX, 23 figures

References in corpus (1)

• Phonons in random alloys: the itinerant coherent-potential approximation

Cited by in corpus (16)

• Distribution of phonon lifetime in Brillouin zone
• First-principles quantitative prediction of the lattice thermal conductivity in random semiconductor alloys: the role of force-constant disorder
• Unfolding the complexity of quasi-particle physics in disordered materials
• An augmented space approach to the study of phonons in disordered alloys : comparison between the itinerant coherent-potential approximation and the augmented space recursion
• Effect of short-range order on the electronic structure and optical properties of the CuZn alloy : an augmented space approach
• Lattice thermal conductivity of disordered binary alloys : a formulation
• Anomalous random correlations of force constants on the lattice dynamical properties of disordered Au-Fe alloys
• Thermal conductivity and diffusion-mediated localization in Fe_{1-x}Cr_{x} Alloys
• Symmetry reduction in the augmented space recursion formalism for random binary alloys
• Interplay of force constants in the lattice dynamics of disordered alloys : An ab-initio study
• Effects of dilution and disorder on magnetism in diluted spin systems
• Lattice thermal conductivity of disordered NiPd and NiPt alloys
• Effect of disorder on the electronic properties of graphene: a theoretical approach
• Inelastic neutron scattering in random binary alloys : an augmented space approach
• Increased metallicity of Carbon nanotubes because of incorporation of extended Stone-Wales' defects: an ab-initio real space approach
• Phonons in disordered alloys : a multiple scattering approach