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Dear wannier90 developers,<br><br>Recently, I used the postw90.x to interpolate the velocity. According to the <div><br><div>user_guide, the unit of energy is eV, and the unit of k is 2pi/Ang.</div><div><br>To convert the velocity to SI unit, I found the conversion factor as</div><div><br>1/hbar * eV / (2pi/Ang) = 24179.88 m/s. But when I fed the converted velocities</div><div><br>to my own Boltzmann transport program, I found the result is quit strange</div><div><br>(too small than I thought). So I compare the calculated transport coefficients </div><div><br>with BoltzTraP. The Seebeck is almost the same, but the conductivity is </div><div><br>too much smaller. And I get a factor of about 40, which happens to be </div><div><br></div><div>close to (2Pi)**2~=39.478. If this is true, I guess the unit of k is 1/Ang rather </div><div><br></div><div>than 2pi/Ang. <span style="font-size: 10.5pt;">Could anyone answer my doubts? Any help will be </span><span style="font-size: 10.5pt;">grateful.</span></div><div><br>Best regards,<br><br>Dengdong Fan,<br>School of Physics and Technology, Wuhan University.<br><br><br><br><br>
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