In general the low loss electron energy loss peak contain the information about the electronic structure of materials. From free electron model (Drude Model) the plasmon energy is given by a relation
Ep = sqrt. (ne2h2/ π m)
where,
n = conduction/valence electron density
e= electron (hole) charge
m= electron (hole) effective mass
h= Plank's constant
Once we have "n" values we can calculate Fermi wave vector and followed by Fermi energy. My concern is that, is it applicable for compound like Ni3Al, Ni3Nb and Fe3C, so on, or it is only applicable for solid solution alloys.
Thanks
PS M Jena
Hello DR JENA: the following is my input to your question:
https://arxiv.org/ftp/arxiv/papers/0805/0805.0397.pdf
Electron energy loss spectroscopy (EELS) performed in a scanning ... the nanoparticle to far-field radiation, thereby allowing excitation of a ... (61) We continue with studies of LSPRs in alloys, quantum plasmons, ... electrons whose de Broglie wavelengths are at the picometer level. ... LSPR Peak Analysis.
Article Probing Nanoparticle Plasmons with Electron Energy Loss Spectroscopy
I hope the above is helpful. Regards--
Originally the Drude Model is even for simple metals like sodium not really valid. In your case of an Ni alloy the electronic structure with interband transitions Drude is an oversimplification as the d-band contribution at the Fermienergy is not negligible.
Thank You Christian Pettenkofer
Yes you are right, the Drude model is a basic model which also not applicable for simple metals. However, we can not deny, the plasmon energy loss is depends on the free electron density (n), which is material chemistry dependent. Thus my question is; is EELS technique reliable or in other words what is the accuracy of determined Fermi energy level?
Thanks
PS M Jena
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