<p style="border: 0px solid rgb(217, 217, 227); box-sizing: border-box; margin: 0px 0px 1.25em; color: rgb(55, 65, 81); font-family: Söhne, ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Ubuntu, Cantarell, "Noto Sans", sans-serif, "Helvetica Neue", Arial, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji"; font-size: 16px; white-space-collapse: preserve;">Hi Christopher,</p><p style="border: 0px solid rgb(217, 217, 227); box-sizing: border-box; margin: 1.25em 0px; color: rgb(55, 65, 81); font-family: Söhne, ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Ubuntu, Cantarell, "Noto Sans", sans-serif, "Helvetica Neue", Arial, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji"; font-size: 16px; white-space-collapse: preserve;">Thank you for your recommendations. As you pointed out, pymatgen can be employed to adjust my structures, and I am now planning to carry out geometry optimizations in batches. However, I find myself unsure about the location of stresses in the output files. Are there specific keywords that need to be configured in my input file to capture this information? Furthermore, can pymatgen assist in the process of fitting stresses and strains appropriately? I would greatly appreciate it if you could provide insights into how this functionality operates.</p><p style="border: 0px solid rgb(217, 217, 227); box-sizing: border-box; margin: 1.25em 0px; color: rgb(55, 65, 81); font-family: Söhne, ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Ubuntu, Cantarell, "Noto Sans", sans-serif, "Helvetica Neue", Arial, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji"; font-size: 16px; white-space-collapse: preserve;">Thank you once again for your assistance.</p><p style="border: 0px solid rgb(217, 217, 227); box-sizing: border-box; margin: 1.25em 0px 0px; color: rgb(55, 65, 81); font-family: Söhne, ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Ubuntu, Cantarell, "Noto Sans", sans-serif, "Helvetica Neue", Arial, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji"; font-size: 16px; white-space-collapse: preserve;">Best regards,</p><br /><div><div dir="auto">在2024年1月8日星期一 UTC+8 23:51:00<cpash...@gmail.com> 写道:<br /></div><blockquote style="margin: 0px 0px 0px 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">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: <a href="https://pymatgen.org/pymatgen.analysis.elasticity.html" target="_blank" rel="nofollow">https://pymatgen.org/pymatgen.analysis.elasticity.html</a> . 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></blockquote></div>
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