tcp_sigma -truncated Coulomb potential cutoff width
DESCRIPTION
The tcp_sigma variable enters the expression of the truncated Coulomb potential used to compute the electrostatic energy when tcp is set to ON. The truncated Coulomb potential has the form
v(r) = ( 1 / r ) * 0.5 * erfc( (r - tcp_rcut) / tcp_sigma )The variable tcp_rcut limits the range of the Coulomb potential. The variable tcp_sigma determines the width of the truncation region.
DEFAULT VALUE
0
ALLOWED VALUES
positive floating point
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