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Dear VASP users,

I have followed the GW and GW0 calculations on silicon as outlined in the manual. The corrected gap values appear OK. The imaginary dielectric function, as printed in the OUTCAR under "inverse of the dielectric matrix", consists of two numbers printed between the energy and "Dielectric Constant". Does anyone know what these two numbers refer to? I'm guessing one of them is the imaginary dielectric constant. However, my understanding is that the imaginary dielectric constant is positive. I get some negative values for both these numbers for silicon.

I'd appreciate your input.

Vahid

Vahid Askarpour
Physics Department
Dalhousie University
Halifax, Canada

<span class='smallblacktext'>[ Edited ]</span>

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