Methods are encoded in the following format: PMETHODparameters, where

Method

Name of the method itself includes core method optinally followed by a suffix separated by '-'. Examples of methods

Supported suffixes are

Parameters: basis set

Basis set encode four parts: family (in lowercase), size (positive integer), variations (suffix), and k-grid (if calculations are not converged with respect to k-sampling).

Basis set family:

Basis set size can denote one of

Possible values of the suffix for pseudopotentials are interpreted as in VASP manual ("s" for softer, "h" for harder, "sv", "pv", "d").

Possible values of the suffix for gaussian basis sets are interpreted as follows. A letter may indicate additional functions: "p" polarization orbitals, "a" diffuse orbitals. Immediately after that letter the description may follow. The decription of polarization orbitals follows the Gaussian notations with commas and parentheses omitted, e.g. "3df2pd" means 3d plus 1f orbitals for nonhydrogens and 2 sp-orbitals plus 1 d-orbital on hydrogens. The absence of the description implies a default polarization basis ("p" for smaller one, "pp" for larger one), e.g. "p2p"="p2pd", "p2pp"="p2pdp". The description of diffuse orbitals is currently limited to two cases: absence of the description means a diffusion orbital on nonhydrogens, an additional "a" means a diffusion orbital on all atoms. See also Gaussian manual.

Possible values of k-grid are currently include Gamma-centered grids in the format "Gn1n2n3", where 1<ni<10 denotes number of k-points in i-th directions. Repetitive "ni" or "ni" fixed by symmetry should not be included, e.g. "G5" for isotropic 2D systems means "G551".