Hi Peng,<div><br /></div><div>If you want to do mechanical properties, the DFPT variant is not implemented in cp2k (last I checked), you will need to compute the stresses and fit the corresponding stresses and strains. One such way is to use the elasticity module available from materials project / pymatgen: https://pymatgen.org/pymatgen.analysis.elasticity.html . Specifically, you should use it to modify the structures (generate the deformations) and fit it. <br /><br />Keep in mind that you can't use the wavefunctions to restart at each step because the structure changes. <br /><br /></div><div>Christopher</div><div><br /></div><div><div dir="auto">On Friday, January 5, 2024 at 3:07:13 AM UTC+1 xiao peng wrote:<br /></div><blockquote style="margin: 0px 0px 0px 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">Hi, everyone<div><br /><div>I recently calculated some materials that require computing mechanical properties, such as bulk modulus,
Young's modulus, and shear modulus. But I checked the official website tutorial of cp2k and found that there seem to be no relevant examples.<div>I would appreciate if you could give me some examples.<br /></div></div></div><div><br /></div><div><span style="font-family: "Sans Serif";">Thank you for your time and consideration.</span><br style="font-family: "Sans Serif";" /><span style="font-family: "Sans Serif";">Regards, Peng</span><br /></div></blockquote></div>
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