<div>Dear Cp2k users,</div><div></div><div>I have carried on a
second-generation Car-Parrinello (SGCP) MD simulation for Pt(111)/water interface. Unit cell contains Pt: 6x6x4 (2 frozen), water: 134 molecules.</div><div><br></div><div>I have performed similar workflow as Onofrio (<span>"SGCPMD: number of steps per SCF run increase suddenly after initial 400 MD steps</span>"). But I have used the NOISY_GAMMA as in the publication <b>"First-Principles Simulations of an Aqueous CO/Pt(111) Interface" doi:10.1021/acs.jpcc.8b05933, </b>Pt: 5E-05 1/fs and for water 2.2E-04 1/fs. Temperature is set to 330K. <br><br><b></b><div>Unfortunately in my case along the SGMD the temperature of Pt region drops to roughly 180 K, the temperature of the hole system is about 328K. I expected that the temperature of Pt region would be closer to the water after a equilibration time of 4ps. Does this mean that probably my system is well-equilibrated? Is this going to affect the dynamics of the system? (PS: the density profile seems ok, double peak on oxygen, well-known for Pt(111))<br></div><div><br></div><div>Many thanks in advance!</div><div>Alexandra</div><div><br></div><div>PS: I also observed the increase of the SCF steps after a restart!</div><div><br></div><div></div><div></div><div>TOP: red dashed line: average temperature of system</div><div>BOTTOM: temperature for each region<br></div><div><img alt="SGMD_00MD_Temp.png" data-iml="61022616" width="566px" height="302px" src="cid:322f11a1-3d00-4976-a378-41952e26082a"><img alt="SGMD_00MD_TempLAN.png" data-iml="60390315" width="552px" height="432px" src="cid:1375addc-77e8-4c00-bff3-445d51306990"></div><div><br></div></div>
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