[Wien] Optical properties

[Chukwuemeka Okoye]

Dear all,
I will appreciate some clarifications on the calculation of optical
properties of half metal in which the majority (spin up) channel is
semiconducting and metallic in the spin down channel. After calculating
optic -up(-dn) the following steps were followed. (i) For spin down
(metallic) channel: Calculate joint -dn (with switch 6); Calculate joint
-dn (with switch 4)
*Question*:How can the intraband and interband contributions be extracted
separately for this metallic spin down channel?
(ii) For the semiconducting spin up channel, switch 4 was used to calculate
joint -up.
*Question*: Where are the interband contributions written or does the new
outcome overwrite the earlier one?
(iii) joint-updn_lapw
*Question*: Is it necessary to use switch 6 in inkram, since we have both
semiconducting and metallic channels mixed in (iii) above? If 1 is used in
line 3 of inkram, shall we regard the outcome of x kram  as 'sum' of both
intraband and interband transitions?

Thanks for your kind assistance.

Chukwuemeka Okoye


*------------------------------Chukwuemeka M I Okoye*

*Department of Physics and Astronomy,*

*University of Nigeria, *

*Nsukka, Enugu State,*
*Nigeria*
Telephone: +234 7038766990
E-mail: cmi.okoye at unn.edu.ng
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