LEXCH

LEXCH = [string] LEXCH = CA.OR.PBE

Default: LEXCH	= CA	for LDA pseudopotentials
	= PE	for GGA pseudopotentials

Definition: Set the default exchange-correlation functional.

The functional specified by LEXCH was used as a reference when the PAW potential was created. The transferability of PAW potentials to other exchange-correlation functionals is quite good. So, the functional used during the calculation can be freely adjusted (despite the very prominent warning in the stdout).

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