<div dir="ltr">Dear experts,<div>My aim to calculate the deformation potential is for relaxation time measurement. For this I applied the strain method and noted the band edge energy value for VBM and CBM from the band structure. I found that VBM is exactly at Fermi energy at 0 and there is no any change with strain. So, I could not find the band energy edge of the VBM, which is essential in relaxation time calculation. I checked the calculation of this paper: <span style="color:rgb(0,0,0);font-family:courier,"courier new",monospace;font-size:14px">[8] </span><a rel="nofollow" href="https://doi.org/10.1038/srep22778" style="font-family:courier,"courier new",monospace;font-size:14px;outline:0px;color:rgb(57,115,66)">https://doi.org/10.1038/srep22778</a></div><div>I found that the band structure VBM lies exactly at 0, but the paper has reported differently; that may be for measuring deformation potential. The paper has mentioned this : Figure 2(a) presents the band edge energy (E edge ) values at the CBM and VBM for electrons and holes as a function of the uniaxial strain δ β assigned along the a-axis, respectively, exhibiting good linear dependence. Here, the average electrostatic potential 32 is set as a reference to obtain the absolute band edge shifts. The DP constant λ β values, as listed in Table 1, are similar for electrons (λ β = − 15.94 eV) and holes (λβ = − −14.51 eV). Now, my question is how to do this calculation for measuring band edge energy for VBM and CBM accurately?</div></div><br><div class="gmail_quote gmail_quote_container"><div dir="ltr" class="gmail_attr">On Sun, Feb 8, 2026 at 5:53 PM uchit chaudhary <<a href="mailto:uchitchaudhary99@gmail.com">uchitchaudhary99@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr">Dear experts,<div><br></div><div>How to calculate the deformation potential in Wien2k?</div><div><br></div><div><br></div><div><br></div><div><br></div><div>Best Regards,</div><div>Wien2k user</div><div>uchit</div></div>
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