NDOWN (.param)

Keyword type

Real

Description

This keyword determines the total number of down-spin electrons.

This parameter is used only if SPIN_POLARIZED = TRUE.

Default

If the SPIN has been specified then:

	NDOWN : (NELECTRONS - SPIN)/2

If neither NDOWN nor SPIN have been specified:

	NDOWN : NELECTRONS/2

Example

NDOWN : 12

See Also:

SPIN
SPIN_POLARIZED
NELECTRONS
NUP
CASTEP keyword glossary
CASTEP parameters keywords