ENCUTGWSOFT
ENCUTGWSOFT = [real] (energy cutoff for response function)
| Default: ENCUTGWSOFT | = ENCUTGW | for ALGO=ACFDT |
| = ENCUTGW | else |
The flag allows to truncate the Coulomb kernel slowly between the energy specified by ENCUTGWSOFT and ENCUTGW. This usually leads to much smoother energy-volume curves in AC-FDT and MP2 calculations. The modified Coulomb kernel is in this case: Failed to parse (Conversion error. Server ("cli") reported: "[INVALID]"): {\displaystyle v_{\bold{G}} = \frac{4 \pi e^2} {| \bold{G}|^2} \frac{1}{2} \left( 1 + {\mathbf{cos} \left( \pi \, \frac{ \frac{\hbar^{2} |\bold{G}|^2 }{2 m_e} - {{TAG|ENCUTGWSOFT}}}{ {{TAG|ENCUTGW}} - {{TAG|ENCUTGWSOFT}}} \right) \right) \qquad \mbox{for} \quad \frac{\hbar^2 |\bold{G}|^2 }{2 m_e} > {{TAG|ENCUTGWSOFT}}}
Failed to parse (Conversion error. Server ("cli") reported: "[INVALID]"): {\displaystyle \left( 1 + {\mathbf{cos} \left( \pi \, \frac{ \frac{\hbar^{2} |\bold{G}|^2 }{2 m_e} - {{TAG|ENCUTGWSOFT}}}{ {{TAG|ENCUTGW}} - {{TAG|ENCUTGWSOFT}}} \right) \right)}
Related Tags and Sections
PRECFOCK, ENCUT, ENCUTGW, GW calculations