摘要: The optical absorption spectrum of Cu2MnAl is calculated within the RPA using energy values and wavefunctions determined by tight-binding orthogonalised plane wave (TB OPW) method compared with experiment. It found that transitions between OPW in hybridised states dominantly contribute to main structure spectrum. correlation effect due electron-hole interaction evaluated taking into account G(q, omega ) function which describes exchange effects. result suggests correlated pair has a broadening on spectrum, particularly prominent peak.
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