<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div>Hello Dear developers/users of Quantum Expresso,</div><div><br></div><div>I would like to know if I can use Quantum Expresso to perform an "old-fashion" Hartree–Fock calculation of the ground state of a periodic crystal (I am interested in graphene).</div><div><br></div><div>Would it be sufficient to use the Hartree-Fock and Hybrid functionals described in Section 5.1.0.6 of</div><div><a href="http://www.quantum-espresso.org/user_guide/node26.html#SECTION00061060000000000000">http://www.quantum-espresso.org/user_guide/node26.html#SECTION00061060000000000000</a> ?</div><div><br></div><div>Actually I would be interested in *all electron* Hartree-Fock calculations.</div><div><br></div><div>Best regards,</div><div>Salazar</div></body></html>