Dear All,<br><br>While I'm working the STM image simulation of some spin-polarized systems, I notice that the Fermi energy is always the highest occupied state eigenvalue of the beta spin. If, for instance, I have a charged surface (semi-conductor with a band gap of ~3eV as neutral) with one excess electron in the gap on the alpha spin having an eigenvalue of E1, and the highest occupied state of the beta spin is still at the valence band top with an eigenvalue of E2 (E1 > E2). The program would however take E2, rather than E1 as the Fermi energy, which means if I'm calculating the empty state STM image, I will have to include the gap state, which is occupied. <br>
<br>I'm wondering if there is someway to deal with this, or it doesn't matter.<br><br>Best regards,<br>Irene <br>