Hello,<div><br /></div><div>I was trying to find the band gap of a SiC slab (the surface is cut by the {111} orientation) and the result is always wrong (the band gap is way too small), due to (as far as my understanding goes) spurious interaction among surface states. I know that terminating the surface dangling bonds/free electrons with H atoms should help, but I am worried that the H will alter the crystal too much. Is there another way to do it ?</div><div><br /></div><div>Currently the system is 12 Si atoms, 12 C atoms and H-terminated "bottom" surface. I am using the periodic Poisson solver in 3D, while leaving enough space in the direction perpendicular to the surface.</div><div><br /></div><div>Best Regards,</div><div>Dobromir</div><div><br /></div><div> </div>
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