<div class="iw_mail" dir="auto" style="font-size: 13px;"><div>Dear Krishnendu,</div><div><br></div><div>Hi.</div><div>I add a few words to Prof. Stefano Baroni's reply:</div><div>Suppose you have a harmonic spring obeying Hook's law, for which the stored energy is E=K*(Δx)^2/2.</div><div>Here, K plays the role of interatomic force constant. As you see, just knowing K one can not calculate</div><div>the stored energy unless on knows the value of Δx.</div><div><br></div><div>Bests<br></div><div><br></div><div class=""><div>-------------------------------</div><div>Mahmoud Payami</div><div>NSTRI, AEOI,Tehran, Iran</div><div>Email: mpayami@aeoi.org.ir</div><div>Phone: +98(0)2182066504</div><div>------------------------------------<br></div></div><div><br></div><div class="iw-reply-block" dir="LTR" style="font-size: 13px;font-family:Roboto, Tahoma, Helvetica, sans-serif;line-height:normal;"><div style="margin:0;font-family:Roboto, Tahoma, Helvetica, sans-serif;font-size:13px;font-weight:300;line-height:150%;letter-spacing:normal;color:#333333;"><div style="display:none;margin:0;font-family:Roboto, Tahoma, Helvetica, sans-serif;font-size:13px;font-weight:300;line-height:150%;letter-spacing:normal;color:#333333;">----- Original Message -----</div><hr style="width:100%;padding:0;margin:10px 0;color:#888888;background-color:#888888;border-color:#DDDDDD;" width="100%" size="1">From: Stefano Baroni (<a href="mailto:baroni@sissa.it" style="font-family: Helvetica, sans-serif; font-size: 12px; font-weight: 300; line-height: 150%; color: rgb(0, 136, 204); text-decoration: none;">baroni@sissa.it</a>)<br>Date: 06/01/1403 11:41<br>To: Quantum ESPRESSO users Forum (<a href="mailto:users@lists.quantum-espresso.org" style="font-family: Helvetica, sans-serif; font-size: 12px; font-weight: 300; line-height: 150%; color: rgb(0, 136, 204); text-decoration: none;">users@lists.quantum-espresso.org</a>)<br>Subject: <span style="font-family:Helvetica, sans-serif;font-size:12px;font-weight:300;line-height:150%;color:#333;text-decoration:none;font-weight:bold;">Re: [QE-users] Binding energy and interatomic force constant</span></div><br><div>No. SB<div><br id="lineBreakAtBeginningOfSignature"><div dir="ltr"><div><span style="background-color: rgba(255, 255, 255, 0);">___</span></div><div><span style="background-color: rgba(255, 255, 255, 0);">Stefano Baroni, Trieste -- <a href="http://stefano.baroni.me">http://stefano.baroni.me</a></span></div></div><div dir="ltr"><br><blockquote type="cite">On 25 Mar 2024, at 07:15, KRISHNENDU MUKHERJEE <<a href="mailto:krishnendu@nmlindia.org">krishnendu@nmlindia.org</a>> wrote:<br><br></blockquote></div><blockquote type="cite"><div dir="ltr"><div style="font-family: arial, helvetica, sans-serif; font-size: style=;"><div><br></div><div>Dear all,</div><div><br data-mce-bogus="1"></div><div> Can I compute the binding energy of a nano-crystal from the interatomic force constant ?</div><div><br data-mce-bogus="1"></div><div>Thanking you,</div><div>Best regards,</div><div>Krishnendu</div><div data-marker="__SIG_PRE__"><br></div></div><br><br><span>_______________________________________________</span><br><span>The Quantum ESPRESSO community stands by the Ukrainian</span><br><span>people and expresses its concerns about the devastating</span><br><span>effects that the Russian military offensive has on their</span><br><span>country and on the free and peaceful scientific, cultural,</span><br><span>and economic cooperation amongst peoples</span><br><span>_______________________________________________</span><br><span>Quantum ESPRESSO is supported by MaX (<a href="http://www.max-centre.eu">www.max-centre.eu</a>)</span><br><span>users mailing list <a href="mailto:users@lists.quantum-espresso.org">users@lists.quantum-espresso.org</a></span><br><span><a href="https://lists.quantum-espresso.org/mailman/listinfo/users">https://lists.quantum-espresso.org/mailman/listinfo/users</a></span></div></blockquote></div><hr>_______________________________________________<br>The Quantum ESPRESSO community stands by the Ukrainian<br>people and expresses its concerns about the devastating<br>effects that the Russian military offensive has on their<br>country and on the free and peaceful scientific, cultural,<br>and economic cooperation amongst peoples<br>_______________________________________________<br>Quantum ESPRESSO is supported by MaX (<a href="http://www.max-centre.eu">www.max-centre.eu</a>)<br>users mailing list <a href="mailto:users@lists.quantum-espresso.org">users@lists.quantum-espresso.org</a><br><a href="https://lists.quantum-espresso.org/mailman/listinfo/users">https://lists.quantum-espresso.org/mailman/listinfo/users</a></div></div></div>