World's Best Scientists 2026 revealed!
Björn O. Roos

Björn O. Roos

D-Index & Metrics

Chemistry

D-Index
97
Citations
57412
World Ranking
1429
National Ranking
20

Björn O. Roos publication distribution in Chemistry in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Chemistry in 2026. The highlighted bar marks where Björn O. Roos sits on this spectrum.

61–80 publications: 66 scientists 81–100 publications: 302 scientists 101–120 publications: 623 scientists 121–140 publications: 918 scientists 141–160 publications: 1,218 scientists 161–180 publications: 1,350 scientists 181–200 publications: 1,344 scientists 201–220 publications: 1,281 scientists 221–240 publications: 1,216 scientists 241–260 publications: 1,100 scientists 261–280 publications: 979 scientists 281–300 publications: 939 scientists 301–320 publications: 764 scientists 321–340 publications: 643 scientists 341–360 publications: 628 scientists 361–380 publications: 522 scientists 381–400 publications: 459 scientists 401–420 publications: 397 scientists 421–440 publications: 327 scientists 441–460 publications: 270 scientists 461–480 publications: 265 scientists 481–500 publications: 252 scientists 501–520 publications: 201 scientists 521–540 publications: 185 scientists 541–560 publications: 148 scientists 561–580 publications: 148 scientists 581–600 publications: 132 scientists 601–620 publications: 114 scientists 621–640 publications: 104 scientists 641–660 publications: 91 scientists 661–680 publications: 92 scientists 681–700 publications: 73 scientists 701–720 publications: 57 scientists 721–740 publications: 54 scientists 741–760 publications: 67 scientists 761–780 publications: 45 scientists 781–800 publications: 46 scientists 801–820 publications: 39 scientists 821–840 publications: 32 scientists 841–860 publications: 36 scientists 861–880 publications: 29 scientists 881–900 publications: 26 scientists 901–920 publications: 24 scientists 921–940 publications: 14 scientists 941–960 publications: 23 scientists 961–980 publications: 28 scientists 981–1,000 publications: 15 scientists 1,001–1,020 publications: 29 scientists 1,021–1,040 publications: 12 scientists 1,041–1,060 publications: 19 scientists 1,061–1,080 publications: 12 scientists 1,081–1,100 publications: 6 scientists 1,101–1,120 publications: 8 scientists 1,121–1,140 publications: 12 scientists 1,141–1,160 publications: 5 scientists 1,161–1,180 publications: 6 scientists 1,181–1,200 publications: 14 scientists 1,201–1,220 publications: 7 scientists 1,221–1,240 publications: 2 scientists 1,241–1,260 publications: 6 scientists 1,261–1,280 publications: 4 scientists 1,281–1,294 publications: 6 scientists 1,295+ publications: 100 scientists
61 publications 1,295+

This scientist: 363 publications — 75th percentile

75% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 1,295 publications or more.

Björn O. Roos D-index placement in Chemistry in 2026

The chart shows the D-index (discipline H-index) distribution of Chemistry scientists ranked by Research.com in 2026. The highlighted bar marks where Björn O. Roos sits on this spectrum.

40–41 D-Index: 289 scientists 42–43 D-Index: 612 scientists 44–45 D-Index: 808 scientists 46–47 D-Index: 776 scientists 48–49 D-Index: 835 scientists 50–51 D-Index: 861 scientists 52–53 D-Index: 872 scientists 54–55 D-Index: 933 scientists 56–57 D-Index: 1,051 scientists 58–59 D-Index: 930 scientists 60–61 D-Index: 882 scientists 62–63 D-Index: 834 scientists 64–65 D-Index: 731 scientists 66–67 D-Index: 775 scientists 68–69 D-Index: 683 scientists 70–71 D-Index: 646 scientists 72–73 D-Index: 561 scientists 74–75 D-Index: 501 scientists 76–77 D-Index: 437 scientists 78–79 D-Index: 388 scientists 80–81 D-Index: 354 scientists 82–83 D-Index: 292 scientists 84–85 D-Index: 275 scientists 86–87 D-Index: 254 scientists 88–89 D-Index: 235 scientists 90–91 D-Index: 185 scientists 92–93 D-Index: 192 scientists 94–95 D-Index: 155 scientists 96–97 D-Index: 163 scientists 98–99 D-Index: 125 scientists 100–101 D-Index: 105 scientists 102–103 D-Index: 105 scientists 104–105 D-Index: 112 scientists 106–107 D-Index: 88 scientists 108–109 D-Index: 68 scientists 110–111 D-Index: 69 scientists 112–113 D-Index: 65 scientists 114–115 D-Index: 79 scientists 116–117 D-Index: 61 scientists 118–119 D-Index: 44 scientists 120–121 D-Index: 37 scientists 122–123 D-Index: 40 scientists 124–125 D-Index: 33 scientists 126–127 D-Index: 26 scientists 128–129 D-Index: 34 scientists 130–131 D-Index: 35 scientists 132–133 D-Index: 25 scientists 134–135 D-Index: 27 scientists 136–137 D-Index: 17 scientists 138–139 D-Index: 16 scientists 140–141 D-Index: 20 scientists 142–143 D-Index: 20 scientists 144–145 D-Index: 15 scientists 146–147 D-Index: 9 scientists 148–149 D-Index: 9 scientists 150–151 D-Index: 16 scientists 152–153 D-Index: 11 scientists 154–155 D-Index: 9 scientists 156–157 D-Index: 3 scientists 158 D-Index: 3 scientists 159+ D-Index: 98 scientists
40 D-Index 159+

This scientist: 97 D-Index — 92nd percentile

92% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 159 D-Index or more.

Overview

Björn O. Roos was affiliated with Lund University in Sweden during their academic career. The available information indicates a focus on scholarly work within an academic environment, but specific research areas or main fields of study are not documented here.

No records of published papers, including titles, years, or venues, are provided for this scientist. Similarly, there is no detailed information on frequent co-authors or typical publication venues.

The data does not include any books published by Björn O. Roos, nor are there documented main topics or subfields of study associated with their work. Additionally, there are no listed awards or recognitions received during their career.

The scientist is noted as deceased. The profile is therefore presented in past tense and reflects only the available factual information without evaluative commentary.

Best Publications

  • A complete active space SCF method (CASSCF) using a density matrix formulated super-CI approach

    Björn O. Roos;Peter R. Taylor;Per E.M. Si≐gbahn

  • Second-order perturbation theory with a complete active space self-consistent field reference function.

    Kerstin Andersson;Per‐Åke Malmqvist;Björn O. Roos

  • Second-order perturbation theory with a CASSCF reference function

    Kerstin. Andersson;Per Aake. Malmqvist;Bjoern O. Roos;Andrzej J. Sadlej

  • Software news and update MOLCAS 7 : The Next Generation

    Francesco Aquilante;Luca De Vico;Nicolas Ferré;Giovanni Ghigo

  • Density matrix averaged atomic natural orbital (ANO) basis sets for correlated molecular wave functions

    Kristine Pierloot;Birgit Dumez;Per-Olof Widmark;Björn O. Roos

  • Molcas: a program package for computational chemistry.

    Gunnar Karlström;Roland Lindh;Per-Åke Malmqvist;Björn O Roos

  • The Complete Active Space Self‐Consistent Field Method and its Applications in Electronic Structure Calculations

    Björn O. Roos

  • The multi-state CASPT2 method

    James Finley;Per-Åke Malmqvist;Björn O. Roos;Luis Serrano-Andrés

  • Main group atoms and dimers studied with a new relativistic ANO basis set

    Björn O. Roos;Roland Lindh;Per-Åke Malmqvist;Valera Veryazov

  • The complete active space SCF (CASSCF) method in a Newton–Raphson formulation with application to the HNO molecule

    Per E. M. Siegbahn;Jan Almlöf;Anders Heiberg;Björn O. Roos

  • The restricted active space (RAS) state interaction approach with spin-orbit coupling

    Per Åke Malmqvist;Björn O. Roos;Bernd Schimmelpfennig

  • New relativistic ANO basis sets for transition metal atoms.

    Björn O. Roos;Roland Lindh;Per-Ake Malmqvist;Valera Veryazov

  • Determinant based configuration interaction algorithms for complete and restricted configuration interaction spaces

    Jeppe Olsen;Björn O. Roos;Poul Jo;rgensen

  • A modified definition of the zeroth-order Hamiltonian in multiconfigurational perturbation theory (CASPT2)

    Giovanni Ghigo;Björn O. Roos;Per-Åke Malmqvist

  • The CASSCF state interaction method

    Per-Åke Malmqvist;Björn O. Roos

  • Multiconfigurational perturbation theory with level shift — the Cr2 potential revisited

    Björn O. Roos;Kerstin Andersson

  • A Comparison of the Super-CI and the Newton-Raphson Scheme in the Complete Active Space SCF Method

    Per Siegbahn;Anders Heiberg;Björn Roos;Bernard Levy

  • Does density functional theory contribute to the understanding of excited states of unsaturated organic compounds

    David J. Tozer;Roger D. Amos;Nicholas C. Handy;Bjorn O. Roos

  • Towards an accurate molecular orbital theory for excited states: Ethene, butadiene, and hexatriene

    Luis Serrano‐Andrés;Manuela Merchán;Ignacio Nebot‐Gil;Roland Lindh

  • Cholesky Decomposition-Based Multiconfiguration Second-Order Perturbation Theory (CD-CASPT2): Application to the Spin-State Energetics of Co(III)(diiminato)(NPh).

    Francesco Aquilante;Per-Åke Malmqvist;Thomas Bondo Pedersen;Abhik Ghosh

Frequent Co-Authors

Manuela Merchán
Manuela Merchán University of Valencia
Laura Gagliardi
Laura Gagliardi University of Chicago
Roland Lindh
Roland Lindh Uppsala University
Luis Serrano-Andrés
Luis Serrano-Andrés University of Valencia
Andrzej J. Sadlej
Andrzej J. Sadlej Nicolaus Copernicus University
Ulf Ryde
Ulf Ryde Lund University
Mats Olsson
Mats Olsson University of Gothenburg
Enrique Ortí
Enrique Ortí University of Valencia
Geerd H. F. Diercksen
Geerd H. F. Diercksen Max Planck Society

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Best Scientists Citing Björn O. Roos