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5.3 Overview of Available Functionals

5.3.3 Exchange Functionals

(July 4, 2026)

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)

    • Slater: Slater-Dirac exchange functional (Xα method with α=2/3) 329 Dirac P. A. M.
      P. Camb. Philos. Soc.
      (1930), 26, pp. 376.
      Link

    • SR_LSDA (BNL): Short-range version of the Slater-Dirac exchange functional 444 Gill P. M. W., Adamson R. D., Pople J. A.
      Mol. Phys.
      (1996), 88, pp. 1005.
      Link

  • Generalized Gradient Approximation (GGA)

    • PBE: Perdew, Burke, and Ernzerhof exchange functional 1062 Perdew J. P., Burke K., Ernzerhof M.
      Phys. Rev. Lett.
      (1996), 77, pp. 3865.
      Link

    • B88: Becke exchange functional from 1988 95 Becke A. D.
      Phys. Rev. A
      (1988), 38, pp. 3098.
      Link

    • revPBE: Zhang and Yang one-parameter modification of the PBE exchange functional 1552 Zhang Y., Yang W.
      Phys. Rev. Lett.
      (1998), 80, pp. 890.
      Link

    • AK13: Armiento-Kümmel exchange functional from 2013 52 Armiento R., Kümmel S.
      Phys. Rev. Lett.
      (2013), 111, pp. 036402.
      Link

    • B86: Becke exchange functional (Xαβγ) from 1986 92 Becke A. D.
      J. Chem. Phys.
      (1986), 84, pp. 4524.
      Link

    • G96: Gill exchange functional from 1996 453 Gill P. M. W.
      Mol. Phys.
      (1996), 89, pp. 433.
      Link

    • mB86: Becke “modified gradient correction” exchange functional from 1986 93 Becke A. D.
      J. Chem. Phys.
      (1986), 85, pp. 7184.
      Link

    • mPW91: modified version (Adamo and Barone) of the 1991 Perdew-Wang exchange functional 18 Adamo C., Barone V.
      J. Chem. Phys.
      (1998), 108, pp. 664.
      Link

    • muB88 (μB88): Short-range version of the B88 exchange functional by Hirao and coworkers 609 Iikura H. et al.
      J. Chem. Phys.
      (2001), 115, pp. 3540.
      Link

    • muPBE (μPBE): Short-range version of the PBE exchange functional by Hirao and coworkers 609 Iikura H. et al.
      J. Chem. Phys.
      (2001), 115, pp. 3540.
      Link

    • srPBE: Short-range version of the PBE exchange functional by Goll and coworkers 469 Goll E., Werner H.-J., Stoll H.
      Phys. Chem. Chem. Phys.
      (2005), 7, pp. 3917.
      Link
      , 468 Goll E. et al.
      Chem. Phys.
      (2006), 329, pp. 276.
      Link

    • optB88: Refit version of the original B88 exchange functional (for use with vdW-DF-04) by Michaelides and coworkers 696 Klimeš J., Bowler D. R., Michaelides A.
      J. Phys. Condens. Matter
      (2010), 22, pp. 022201.
      Link

    • OPTX: Two-parameter exchange functional by Handy and Cohen 517 Handy N. C., Cohen A. J.
      Mol. Phys.
      (2001), 99, pp. 403.
      Link

    • PBEsol: PBE exchange functional modified for solids 1067 Perdew J. P. et al.
      Phys. Rev. Lett.
      (2008), 100, pp. 136406.
      Link

    • PW86: Perdew-Wang exchange functional from 1986 1073 Perdew J. P., Wang Y.
      Phys. Rev. B
      (1986), 33, pp. 8800.
      Link

    • PW91: Perdew-Wang exchange functional from 1991 1063 Perdew J. P. et al.
      Phys. Rev. B
      (1992), 46, pp. 6671.
      Link

    • RPBE: Hammer, Hansen, and Norskov exchange functional (modification of PBE) 514 Hammer B., Hansen L. B., Nørskov J. K.
      Phys. Rev. B
      (1999), 59, pp. 7413.
      Link

    • rPW86: Revised version (Murray et al.) of the 1986 Perdew-Wang exchange functional 969 Murray É. D., Lee K., Langreth D. C.
      J. Chem. Theory Comput.
      (2009), 5, pp. 2754.
      Link

    • SOGGA: Second-order GGA functional by Zhao and Truhlar 1567 Zhao Y., Truhlar D. G.
      J. Chem. Phys.
      (2006), 128, pp. 184109.
      Link

    • wPBE (ωPBE): Henderson et al. model for the PBE GGA short-range exchange hole 554 Henderson T. M., Janesko B. G., Scuseria G. E.
      J. Chem. Phys.
      (2008), 128, pp. 194105.
      Link

  • Meta-Generalized Gradient Approximation (meta-GGA)

    • TPSS: Tao, Perdew, Staroverov, and Scuseria exchange functional 1344 Tao J. et al.
      Phys. Rev. Lett.
      (2003), 91, pp. 146401.
      Link

    • revTPSS: Revised version of the TPSS exchange functional 1066 Perdew J. P. et al.
      Phys. Rev. Lett.
      (2009), 103, pp. 026403.
      Link

    • BLOC: Minor modification of the TPSS exchange functional that works best with TPSSloc correlation (both by Della Sala and coworkers) 264 Constantin L. A., Fabiano E., Sala F. Della
      J. Chem. Theory Comput.
      (2013), 9, pp. 2256.
      Link

    • modTPSS: One-parameter version of the TPSS exchange functional 1069 Perdew J. P. et al.
      Phys. Rev. A
      (2007), 76, pp. 042506.
      Link

    • oTPSS: TPSS exchange functional with 5 refit parameters (for use with oTPSS correlation) by Grimme and coworkers 462 Goerigk L., Grimme S.
      J. Chem. Theory Comput.
      (2010), 6, pp. 107.
      Link

    • PBE-GX: First exchange functional based on a finite uniform electron gas (rather than an infinite UEG) by Pierre-François Loos 860 Loos P.-F.
      J. Chem. Phys.
      (2017), 146, pp. 114108.
      Link

    • PKZB: Perdew, Kurth, Zupan, and Blaha exchange functional 1064 Perdew J. P. et al.
      Phys. Rev. Lett.
      (1999), 82, pp. 2544.
      Link

    • regTPSS: Regularized (fixed order of limits issue) version of the TPSS exchange functional 1191 Ruzsinszky A. et al.
      J. Chem. Theory Comput.
      (2012), 8, pp. 2078.
      Link

    • SCAN: Strongly Constrained and Appropriately Normed exchange functional 1327 Sun J., Ruzsinszky A., Perdew J. P.
      Phys. Rev. Lett.
      (2015), 115, pp. 036402.
      Link

    • rSCAN: Regularized SCAN exchange 83 Bartok A. P., Yates J. R.
      J. Chem. Phys.
      (2019), 150, pp. 161101.
      Link
      , 421 Furness J. W. et al.
      J. Chem. Phys.
      (2022), 156, pp. 034109.
      Link

    • r++SCAN: Regularized SCAN with uniform density limit and coordinate scaling behavior 421 Furness J. W. et al.
      J. Chem. Phys.
      (2022), 156, pp. 034109.
      Link

    • r2SCAN: Re-Regularized SCAN exchange 419 Furness J. W. et al.
      J. Phys. Chem. Lett.
      (2020), 11, pp. 8208.
      Link
      , 420 Furness J. W. et al.
      J. Phys. Chem. Lett.
      (2020), 11, pp. 9248.
      Link
      , 421 Furness J. W. et al.
      J. Chem. Phys.
      (2022), 156, pp. 034109.
      Link

    • r4SCAN: Regularized SCAN with exact constraints obeyed by SCAN 421 Furness J. W. et al.
      J. Chem. Phys.
      (2022), 156, pp. 034109.
      Link

    • revSCAN: Revised SCAN exchange 944 Mezei P. D., Csonka G. I., Kállay M.
      J. Chem. Theory Comput.
      (2018), 14, pp. 2469.
      Link

    • TM: Tao-Mo exchange functional derived via an accurate modeling of the conventional exchange hole 1343 Tao J., Mo Y.
      Phys. Rev. Lett.
      (2016), 117, pp. 073001.
      Link

    • regTM: Regularized TM exchange 1045 Patra A., Jana S., Samal P.
      J. Chem. Phys.
      (2020), 153, pp. 184112.
      Link

    • revTM: Revised TM exchange 628 Jana S., Sharma K., Samal P.
      J. Phys. Chem. A
      (2019), 123, pp. 6356.
      Link

    • TASK: TASK exchange functional 53 Aschebrock T., Kümmel S.
      Phys. Rev. Research
      (2019), 1, pp. 033082.
      Link

    • mTASK: Modified TASK exchange functional 989 Neupane B. et al.
      Phys. Rev. Materials
      (2021), 5, pp. 063803.
      Link