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First--principles calculation of the plasmon resonance and of the reflectance spectrum of Silver in the GW approximation

Andrea Marini·Rodolfo Del Sole·Giovanni Onida
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Abstract

We show that the position and width of the plasmon resonance in Silver are correctly predicted by ab--initio calculations including self--energy effects within the GW approximation. Unlike in simple metals and semiconductors, quasiparticle corrections play a key role and are essential to obtain Electron Energy Loss in quantitative agreement with the experimental data. The sharp reflectance minimum at 3.92 eV, that cannot be reproduced within DFT--LDA, is also well described within GW.The present results solve two unsettled drawbacks of linear response calculations for Silver.

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Andrea Marini, Rodolfo Del Sole, Giovanni Onida. 2002-06-17. First--principles calculation of the plasmon resonance and of the reflectance spectrum of Silver in the GW approximation. https://doi.org/10.1103/physrevb.66.115101

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