<div dir="ltr"><div>Dear CP2K members,</div><div><br></div><div>I am calculating the adsorption energies of CO on ZnO (4x4-slab with 4 layers of ZnO(10-10) surface). The adsorption energy obtained from VASP is ~ 0.3 eV (without dispersion) and it is ~ 0.45 eV (with dispersion). However, when calculating the same system with CP2K (geometry is re-optimized), I am obtaining the energies 0.688 eV and 0.863 eV for without and with dispersion correction, respectively. </div><div><br></div><div>The literature value is close to the VASP result. Here is the reference (kindly, see Table 2, C-down, 2x1 cell, Full).</div><div><br></div><div>B Meyer and D Marx 2003 J. Phys.: Condens. Matter 15 L89</div><div><a href="http://iopscience.iop.org/article/10.1088/0953-8984/15/2/112/pdf">http://iopscience.iop.org/article/10.1088/0953-8984/15/2/112/pdf</a></div><div><br></div><div>Could anyone give an advice on why there is such a discrepancy in the adsorption energies irrespective of using the same functional? <br></div><div><br></div><div>I am attaching the geometry and the input file for your reference.</div><div><br></div><div>Thanks,<br></div><div>Sharma.</div><div><div><div><div class="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><font color="#000000"><br></font></div><div dir="ltr"><font color="#000000">--------------------------------------------------------------------<br><font size="2" face="arial, helvetica, sans-serif">SRK <b>Chaitanya</b> Sharma, Yamijala.</font></font></div><div dir="ltr"><font color="#000000"><font size="2" face="arial, helvetica, sans-serif"><a href="http://www.bmwong-group.com/group-members/" target="_blank">http://www.bmwong-group.com/group-members/</a></font></font></div><div dir="ltr"><br></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div>
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