<html><head></head><body><div role="presentation" class="x-component mailBody x-component-default" id="component-1166">Dear users.<br><br>I
am trying to obtain optical properties of a half-metal compound. As i
know for metallic systems we should put tetra/with value=101. But in
half-metal systems one spin channel has metallic behavior and other has
insulator or semiconductor behavior. Accordingly, which value will be
appropriated for this input.<br> <br><span id="ext-gen1581" class="mcntst">Thank you in advance for your attention to this matter</span> </div></body></html>