<div dir="ltr"><div><div>Dear QE users and developers<br></div>I am doing calculations with QE of omega phase of titanium (hexagonal phase with 3 atoms per primitive unit cell). I am doing this calculations with both Methfessel-Paxton and Fermi-Dirac smearing. In both calculations I have got negative entropy (from PW output):<br>
with Methfessel-Paxton Smearing:<br> smearing contrib. (-TS) = 0.00007877 Ry<br></div>and with Fermi-Dirac smearing:<div><div> smearing contrib. (-TS) = 0.00000254 Ry<br></div><div>why does it happen?<br><br>
</div><div>best regards<br></div><div>Uri Argaman<br></div><div>Ben-Gurion University<br></div><div>Israel<br></div></div></div>