<p style="margin: 0cm; font-size: medium; font-family: Calibri, sans-serif; caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);"><span lang="EN-US">Dear CP2K users</span></p><p style="margin: 0cm; font-size: medium; font-family: Calibri, sans-serif; caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);"><span lang="EN-US"> </span></p><p style="margin: 0cm; font-size: medium; font-family: Calibri, sans-serif; caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);"><span lang="EN-US">I would like to calculate core electron binding energy using GW100 method in CP2K.</span></p><p style="margin: 0cm; font-size: medium; font-family: Calibri, sans-serif; caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);"><span lang="EN-US"><a href="https://www.cp2k.org/howto:gw" style="color: rgb(149, 79, 114); text-decoration: underline;">https://www.cp2k.org/howto:gw</a></span></p><p style="margin: 0cm; font-size: medium; font-family: Calibri, sans-serif; caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);"><span lang="EN-US"> </span></p><p style="margin: 0cm; font-size: medium; font-family: Calibri, sans-serif; caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);"><span lang="EN-US">I started with a simple test, using a sulfate ion, SO42-, in vacuum to calculate the S2p lines.</span></p><p style="margin: 0cm; font-size: medium; font-family: Calibri, sans-serif; caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);"><span lang="EN-US">I first optimized the structure of SO42- in vacuum at PBE level, and then perform a GW100 calculation on the optimized structure to obtain the core levels. See attached the input files I used</span></p><p style="margin: 0cm; font-size: medium; font-family: Calibri, sans-serif; caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);"><span lang="EN-US"> </span></p><p style="margin: 0cm; font-size: medium; font-family: Calibri, sans-serif; caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);"><span lang="EN-US">All the calculations run well, with no problem.</span></p><p style="margin: 0cm; font-size: medium; font-family: Calibri, sans-serif; caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);"><span lang="EN-US">What bothers me is the S2p lines. My understanding reading the literature was that GW100 should include spin-orbit coupling. Thus S2p lines should be split into two levels: S2p(1/2) and S2p(3/2) (fine structure). Looking at the output (GW100.out) I see no splitting</span></p><p style="margin: 0cm; font-size: medium; font-family: Calibri, sans-serif; caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);"><span lang="EN-US"> </span></p><p style="margin: 0cm; font-size: medium; font-family: Calibri, sans-serif; caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);"><span lang="EN-US" style="font-size: 10pt; font-family: Arial, sans-serif;"> Molecular orbital E_SCF (eV) Sigc (eV) Sigx-vxc (eV) E_GW (eV)</span></p><p style="margin: 0cm; font-size: medium; font-family: Calibri, sans-serif; caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);"><span lang="EN-US" style="font-size: 10pt; font-family: Arial, sans-serif;"> 1 ( occ ) -2389.519 4.316 -105.931 -2491.133</span></p><p style="margin: 0cm; font-size: medium; font-family: Calibri, sans-serif; caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);"><span lang="EN-US" style="font-size: 10pt; font-family: Arial, sans-serif;"> 2 ( occ ) -498.313 4.023 -48.840 -543.129</span></p><p style="margin: 0cm; font-size: medium; font-family: Calibri, sans-serif; caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);"><span lang="EN-US" style="font-size: 10pt; font-family: Arial, sans-serif;"> 3 ( occ ) -498.312 4.022 -48.840 -543.130</span></p><p style="margin: 0cm; font-size: medium; font-family: Calibri, sans-serif; caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);"><span lang="EN-US" style="font-size: 10pt; font-family: Arial, sans-serif;"> 4 ( occ ) -498.306 4.024 -48.840 -543.122</span></p><p style="margin: 0cm; font-size: medium; font-family: Calibri, sans-serif; caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);"><span lang="EN-US" style="font-size: 10pt; font-family: Arial, sans-serif;"> 5 ( occ ) -498.299 4.020 -48.840 -543.119</span></p><p style="margin: 0cm; font-size: medium; font-family: Calibri, sans-serif; caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);"><span lang="EN-US" style="font-size: 10pt; font-family: Arial, sans-serif;"> 6 ( occ ) -201.514 7.495 -34.306 -228.325</span></p><p style="margin: 0cm; font-size: medium; font-family: Calibri, sans-serif; caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);"><span lang="EN-US" style="font-size: 10pt; font-family: Arial, sans-serif;"> 7 ( occ ) -147.655 7.735 -25.358 <b>-165.279</b></span></p><p style="margin: 0cm; font-size: medium; font-family: Calibri, sans-serif; caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);"><span lang="EN-US" style="font-size: 10pt; font-family: Arial, sans-serif;"> 8 ( occ ) -147.655 7.735 -25.359 <b>-165.279</b></span></p><p style="margin: 0cm; font-size: medium; font-family: Calibri, sans-serif; caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);"><span lang="EN-US" style="font-size: 10pt; font-family: Arial, sans-serif;"> 9 ( occ ) -147.654 7.735 -25.359 <b>-165.279</b></span></p><p style="margin: 0cm; font-size: medium; font-family: Calibri, sans-serif; caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);"><span lang="EN-US" style="font-size: 10pt; font-family: Arial, sans-serif;">…..</span></p><p style="margin: 0cm; font-size: medium; font-family: Calibri, sans-serif; caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);"><span lang="EN-US"> </span></p><p style="margin: 0cm; font-size: medium; font-family: Calibri, sans-serif; caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);"><span lang="EN-US">Is there something wrong in my understating of GW100 and/or in my output?</span></p><p style="margin: 0cm; font-size: medium; font-family: Calibri, sans-serif; caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);"><span lang="EN-US"> </span></p><p style="margin: 0cm; font-size: medium; font-family: Calibri, sans-serif; caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);"><span lang="EN-US">Thank you very much for any possible help or suggestion…the method is new to me.</span></p><p style="margin: 0cm; font-size: medium; font-family: Calibri, sans-serif; caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);"><span lang="EN-US"> </span></p><p style="margin: 0cm; font-size: medium; font-family: Calibri, sans-serif; caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);"><span lang="EN-US">Best regards</span></p><p style="margin: 0cm; font-size: medium; font-family: Calibri, sans-serif; caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);"><span lang="EN-US">Ivan</span></p>
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