Does anybody happen to know how to properly use the LIBXC implementation of the TB09 meta GGA exchange functional? I've applied it to GaAs with tight k-point sampling and the resultant DOS still has a band gap of ~0.7 eV when the literature shows TB09 should give ~1.5eV<div><br></div><div>I've accessed it using </div><div><br></div><div>&XC_FUNCTIONAL</div><div> &MGGA_X_TB09</div><div> &END</div><div> &LDA_C_PW</div><div> &END</div><div>&END</div><div><br></div><div>The TB09 MGGA has a self consistent solution for the parameter "c" in the original implementation, is that not being done here?</div><div><br></div><div>Not too familiar with how libxc works under the hood but maybe someone else does.</div><div><br></div><div>-Nick</div>
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