Note: All exchange functionals in this section can be invoked using the $rem variable EXCHANGE. Popular and/or recommended functionals within each class are listed first and indicated in bold. The rest are in alphabetical order.
Local Spin-Density Approximation (LSDA)
Generalized Gradient Approximation (GGA)
PBE: Perdew, Burke, and Ernzerhof exchange functional867
B88: Becke exchange functional from 198877
revPBE: Zhang and Yang one-parameter modification of the PBE exchange functional1276
AK13: Armiento-Kümmel exchange functional from 201344
B86: Becke exchange functional (X) from 198674
G96: Gill exchange functional from 1996370
mB86: Becke “modified gradient correction” exchange functional from 198675
mPW91: modified version (Adamo and Barone) of the 1991 Perdew-Wang exchange functional18
muB88 (B88): Short-range version of the B88 exchange functional by Hirao and coworkers500
muPBE (PBE): Short-range version of the PBE exchange functional by Hirao and coworkers500
optB88: Refit version of the original B88 exchange functional (for use with vdW-DF-04) by Michaelides and coworkers574
OPTX: Two-parameter exchange functional by Handy and Cohen415
PBEsol: PBE exchange functional modified for solids872
PW86: Perdew-Wang exchange functional from 1986877
PW91: Perdew-Wang exchange functional from 1991868
RPBE: Hammer, Hansen, and Norskov exchange functional (modification of PBE)413
rPW86: Revised version (Murray et al.) of the 1986 Perdew-Wang exchange functional799
SOGGA: Second-order GGA functional by Zhao and Truhlar1284
wPBE (PBE): Henderson et al. model for the PBE GGA short-range exchange hole450
Meta-Generalized Gradient Approximation (meta-GGA)
TPSS: Tao, Perdew, Staroverov, and Scuseria exchange functional1112
revTPSS: Revised version of the TPSS exchange functional871
BLOC: Minor modification of the TPSS exchange functional that works best with TPSSloc correlation (both by Della Sala and coworkers)219
modTPSS: One-parameter version of the TPSS exchange functional873
oTPSS: TPSS exchange functional with 5 refit parameters (for use with oTPSS correlation) by Grimme and coworkers377
PBE-GX: First exchange functional based on a finite uniform electron gas (rather than an infinite UEG) by Pierre-François Loos719
PKZB: Perdew, Kurth, Zupan, and Blaha exchange functional869
regTPSS: Regularized (fixed order of limits issue) version of the TPSS exchange functional984
SCAN: Strongly Constrained and Appropriately Normed exchange functional1098
TM: Tao-Mo exchange functional derived via an accurate modeling of the conventional exchange hole1111