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5.3 Overview of Available Functionals

5.3.3 Exchange Functionals

(December 11, 2025)

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) 322 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 430 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 1024 Perdew J. P., Burke K., Ernzerhof M.
      Phys. Rev. Lett.
      (1996), 77, pp. 3865.
      Link

    • B88: Becke exchange functional from 1988 94 Becke A. D.
      Phys. Rev. A
      (1988), 38, pp. 3098.
      Link

    • revPBE: Zhang and Yang one-parameter modification of the PBE exchange functional 1494 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 91 Becke A. D.
      J. Chem. Phys.
      (1986), 84, pp. 4524.
      Link

    • G96: Gill exchange functional from 1996 439 Gill P. M. W.
      Mol. Phys.
      (1996), 89, pp. 433.
      Link

    • mB86: Becke “modified gradient correction” exchange functional from 1986 92 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 594 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 594 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 454 Goll E., Werner H.-J., Stoll H.
      Phys. Chem. Chem. Phys.
      (2005), 7, pp. 3917.
      Link
      , 453 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 681 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 501 Handy N. C., Cohen A. J.
      Mol. Phys.
      (2001), 99, pp. 403.
      Link

    • PBEsol: PBE exchange functional modified for solids 1029 Perdew J. P. et al.
      Phys. Rev. Lett.
      (2008), 100, pp. 136406.
      Link

    • PW86: Perdew-Wang exchange functional from 1986 1035 Perdew J. P., Wang Y.
      Phys. Rev. B
      (1986), 33, pp. 8800.
      Link

    • PW91: Perdew-Wang exchange functional from 1991 1025 Perdew J. P. et al.
      Phys. Rev. B
      (1992), 46, pp. 6671.
      Link

    • RPBE: Hammer, Hansen, and Norskov exchange functional (modification of PBE) 498 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 939 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 1507 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 538 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 1300 Tao J. et al.
      Phys. Rev. Lett.
      (2003), 91, pp. 146401.
      Link

    • revTPSS: Revised version of the TPSS exchange functional 1028 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) 259 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 1031 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 448 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 838 Loos P.-F.
      J. Chem. Phys.
      (2017), 146, pp. 114108.
      Link

    • PKZB: Perdew, Kurth, Zupan, and Blaha exchange functional 1026 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 1152 Ruzsinszky A. et al.
      J. Chem. Theory Comput.
      (2012), 8, pp. 2078.
      Link

    • SCAN: Strongly Constrained and Appropriately Normed exchange functional 1283 Sun J., Ruzsinszky A., Perdew J. P.
      Phys. Rev. Lett.
      (2015), 115, pp. 036402.
      Link

    • rSCAN: Regularized SCAN exchange 82 Bartok A. P., Yates J. R.
      J. Chem. Phys.
      (2019), 150, pp. 161101.
      Link
      , 408 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 408 Furness J. W. et al.
      J. Chem. Phys.
      (2022), 156, pp. 034109.
      Link

    • r2SCAN: Re-Regularized SCAN exchange 406 Furness J. W. et al.
      J. Phys. Chem. Lett.
      (2020), 11, pp. 8208.
      Link
      , 407 Furness J. W. et al.
      J. Phys. Chem. Lett.
      (2020), 11, pp. 9248.
      Link
      , 408 Furness J. W. et al.
      J. Chem. Phys.
      (2022), 156, pp. 034109.
      Link

    • r4SCAN: Regularized SCAN with exact constraints obeyed by SCAN 408 Furness J. W. et al.
      J. Chem. Phys.
      (2022), 156, pp. 034109.
      Link

    • revSCAN: Revised SCAN exchange 916 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 1299 Tao J., Mo Y.
      Phys. Rev. Lett.
      (2016), 117, pp. 073001.
      Link

    • regTM: Regularized TM exchange 1008 Patra A., Jana S., Samal P.
      J. Chem. Phys.
      (2020), 153, pp. 184112.
      Link

    • revTM: Revised TM exchange 613 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 957 Neupane B. et al.
      Phys. Rev. Materials
      (2021), 5, pp. 063803.
      Link