<div dir="ltr">Dear experts,<div>   When I calculate the MO energy of a slab model via OT method, the results are always 0 as below</div><div><div> </div><div>----------------------------------------------------------------------------------</div><div>MO EIGENVALUES AND MO OCCUPATION NUMBERS</div><div><br></div><div># MO index          MO eigenvalue [a.u.]            MO occupation</div><div>         1                      0.000000                 2.000000</div><div>         2                      0.000000                 2.000000</div><div>         3                      0.000000                 2.000000</div><div>         4                      0.000000                 2.000000</div><div>         5                      0.000000                 2.000000</div><div>         6                      0.000000                 2.000000</div><div>         7                      0.000000                 2.000000</div><div>         8                      0.000000                 2.000000</div><div># Sum                                                   16.000000</div></div><div>-----------------------------------------------------------------------------------</div><div><br></div><div>It looks strange. How to solve this issue? Thank you!</div><div><br></div><div>Best Regards!</div><div>Feng Xu</div></div>