Calculation of the optical spectra of β’-NiAl and CoAl

Date
1991
Authors
Kim, Kwang
Harmon, Bruce
Lynch, David
Lynch, David
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Physics and Astronomy
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Physics and Astronomy
Abstract

Band structures of β’-NiAl and CoAl have been calculated to interpret the experimental optical spectra. The optical transitions of both compounds are calculated as direct interband transitions including electric-dipole matrix elements between the eigenstates of the ground state of the system. All of the structures found in the optical spectra of both compounds involve states with some Ni or Co d character in both the initial and the final states. The overall agreement is good between the calculated spectrum and the optical data for β’-NiAl. For β’-CoAl there is qualitative agreement but some discrepancy for the energy positions and the intensities of the structures. A self-energy correction for the excitation spectrum has been used for β’-CoAl to improve the agreement.

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This article is from Physical Review B 43 (1991): 1948, doi:10.1103/PhysRevB.43.1948. Posted with permission.

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