Hi CP2K forum,<div><br /></div><div>I am trying to calculate the absorption spectrum using LR TDDFT plus sTDA by focusing on one water molecule in a big box.</div><div><br /></div><div>The sTDA calculation was invoked by the following settings:</div><div><br /></div> KERNEL sTDA<div><br /></div><div>The use of PBE functional gives negative excited state energy. Then I also included the following in the input:</div><div><br /> &STDA<br /> FRACTION <b>X</b><br /><div> &END</div><div><br /></div><div>Here I changed <b>X</b> to several values less than 1. Now the calculation can output positive excited state energy, but still, these tests gave much different results compared to PBE0 result.</div><div><br /></div><div>Is there a way I can make the PBE/sTDA result better compared to the PBE0 result?</div><div><br /></div><div>Wei</div><div> </div></div>
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