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# ENCUTGWSOFT

 Default: ENCUTGWSOFT = ENCUTGW${\displaystyle \times 0.8}$ for ALGO=ACFDT = ENCUTGW else
This usually leads to much smoother energy-volume curves in ACFDT calculations and MP2 calculations. The modified Coulomb kernel is in this case: ${\displaystyle v_{{{\mathbf {G}}}}={\frac {4\pi e^{2}}{|{\mathbf {G}}|^{2}}}{\frac {1}{2}}\left(1+\cos \left(\pi \,{\frac {{\frac {\hbar ^{{2}}|{\mathbf {G}}|^{2}}{2m_{e}}}-{\mathrm {ENCUTGWSOFT}}}{{\mathrm {ENCUTGW}}-{\mathrm {ENCUTGWSOFT}}}}\right)\right)\qquad {\mbox{for}}\quad {\frac {\hbar ^{2}|{\mathbf {G}}|^{2}}{2m_{e}}}>{\mathrm {ENCUTGWSOFT}}}$