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| IMAGES | IMAGES must be set to 0 to match MP calculations. |
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| INIWAV | INIWAV must be set as the VASP default of 1 to be consistent with MP calculations. |
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| ISPIN | All values of ISPIN are allowed, though it should be noted that virtuall all MP calculations permit spin symmetry breaking, and have ferromagnetic, antiferrogmanetic, or nonmagnetic ordering. |
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| ISMEAR | The appropriate ISMEAR depends on the bandgap of the material (which cannot be known a priori). As per the VASP manual: for metals (bandgap = 0), any ISMEAR value in [0, 1, 2] is acceptable. For nonmetals (bandgap > 0), any ISMEAR value in [-5, 0] is acceptable. Hence, for those who are performing normal relaxations/static calculations and want to ensure their calculations are MP-compatible, we recommend setting ISMEAR to 0. |
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| ISMEAR | The appropriate ISMEAR depends on the bandgap of the material (which cannot be known a priori). As per the VASP manual: for metals (bandgap = 0), any ISMEAR value in [0, 1, 2] is acceptable. For nonmetals (bandgap > 0), any ISMEAR value in [-5, 0] is acceptable. Hence, for those who are performing normal relaxations/static calculations and want to ensure their calculations are MP-compatible, we recommend setting ISMEAR to 0. |
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| ISIF | MP allows any ISIF $\geq 2$. This value is restricted as such simply because all ISIF values $\geq 2$ output the complete stress tensor. |
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| ISYM | ISYM must be one of -1, 0, 1, 2, except for when the relevant MP input set uses a hybrid functional, in which case ISYM=3 is also allowed. |
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| ISTART | ISTART must be one of: 0, 1, 2. |
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| SYMPREC | SYMPREC must be less than or equal to 1e-3 (as this is the maximum value that the Custodian package will set SYMPREC as of March 2024). |
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| SIGMA | There are several rules for setting SIGMA: <ol> <li> SIGMA must be $\leq 0.05$ for non-metals (bandgap $> 0$). </li> <li> SIGMA must be $\leq 0.2$ for a metal (bandgap = 0). </li> <li> For metals, the SIGMA value must be small enough that the entropy term in the energy is $\leq$ 1 meV/atom (as suggested by the VASP manual). </li> </ol> |
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| VCA | MP data does not include Virtual Crystal Approximation (VCA) calculations from VASP. As such, this parameter should not be set. |
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| VASP version | The following versions of VASP are allowed: 5.4.4 or $>$6.0.0. Versions $<=$ 5.4.3 are not allowed. Version 6.3.1, for example, is allowed. |
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| VASP version | The following versions of VASP are allowed: 5.4.4 or $>$6.0.0. Versions $<=$ 5.4.3 are not allowed. Version 6.3.1, for example, is allowed. |
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