position of Fermi level wrt vacuum
Posted: Wed Jan 13, 2010 9:21 pm
Hello,
I am interested in determining the Fermi level of a material with respect to vacuum (or the work function in the case of insulators).
I see the VASP output posts a value for the Fermi level, however it is positive. This leads me to believe this value is not with respect to the vacuum. Is this true? If so, what is this value with respect to? And how can I get the Fermi level with respect to the vacuum?
Thank you!
I am interested in determining the Fermi level of a material with respect to vacuum (or the work function in the case of insulators).
I see the VASP output posts a value for the Fermi level, however it is positive. This leads me to believe this value is not with respect to the vacuum. Is this true? If so, what is this value with respect to? And how can I get the Fermi level with respect to the vacuum?
Thank you!