<div dir="ltr">Dear Wien2k users,<div><br></div><div>Does the absorption generated by OPTIC include contributions from indirect transitions? I personally think only direct transitions have been taken into account. Because to compute the contribution of indirect transition, one has to know about the dispersion of
phonon. Is that right?</div><div><br></div><div>With regards,</div><div><br></div><div>Fan </div></div>