Bj�rn O. Roos

4.5k total citations · 3 hit papers
21 papers, 4.0k citations indexed

About

Bj�rn O. Roos is a scholar working on Atomic and Molecular Physics, and Optics, Electrical and Electronic Engineering and Spectroscopy. According to data from OpenAlex, Bj�rn O. Roos has authored 21 papers receiving a total of 4.0k indexed citations (citations by other indexed papers that have themselves been cited), including 20 papers in Atomic and Molecular Physics, and Optics, 6 papers in Electrical and Electronic Engineering and 5 papers in Spectroscopy. Recurrent topics in Bj�rn O. Roos's work include Advanced Chemical Physics Studies (20 papers), Molecular Junctions and Nanostructures (6 papers) and Atomic and Molecular Physics (5 papers). Bj�rn O. Roos is often cited by papers focused on Advanced Chemical Physics Studies (20 papers), Molecular Junctions and Nanostructures (6 papers) and Atomic and Molecular Physics (5 papers). Bj�rn O. Roos collaborates with scholars based in Sweden, Italy and Spain. Bj�rn O. Roos's co-authors include Per‐Olof Widmark, B. Joakim Persson, Birgit Dumez, Kristine Pierloot, W.P. Kraemer, Geerd H. F. Diercksen, Laura Gagliardi, Roland Lindh, Andrzej J. Sadlej and Joanna Sadlej and has published in prestigious journals such as Physical Chemistry Chemical Physics, Theoretical Chemistry Accounts and International Journal of Quantum Chemistry.

In The Last Decade

Bj�rn O. Roos

21 papers receiving 3.9k citations

Hit Papers

Density matrix averaged atomic natural orbital (ANO) basi... 1990 2026 2002 2014 1990 1991 1995 500 1000 1.5k
What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

  1. Density matrix averaged atomic natural orbital (ANO) basis sets for correlated molecular wave functions
    1990 1.8k citations Per‐Olof Widmark, Bj�rn O. Roos et al. Theoretical Chemistry Accounts profile →
  2. Density matrix averaged atomic natural orbital (ANO) basis sets for correlated molecular wave functions
    1991 657 citations Per‐Olof Widmark, B. Joakim Persson et al. Theoretical Chemistry Accounts profile →
  3. Density matrix averaged atomic natural orbital (ANO) basis sets for correlated molecular wave functions
    1995 485 citations Kristine Pierloot, Birgit Dumez et al. Theoretical Chemistry Accounts profile →

Peers

Bj�rn O. Roos
Miroslav Urban Slovakia
Yoshiko Sakai Japan
Friedrich Grein Canada
Bjoern O. Roos Sweden
Jules W. Moskowitz United States
John R. Sabin United States
George B. Bacskay Australia
M. Yoshimine United States
Asger Halkier Denmark
Hiroshi Tatewaki Japan
Miroslav Urban Slovakia
Bj�rn O. Roos
Citations per year, relative to Bj�rn O. Roos Bj�rn O. Roos (= 1×) peers Miroslav Urban

Countries citing papers authored by Bj�rn O. Roos

Since Specialization
Citations

This map shows the geographic impact of Bj�rn O. Roos's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Bj�rn O. Roos with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Bj�rn O. Roos more than expected).

Fields of papers citing papers by Bj�rn O. Roos

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Bj�rn O. Roos. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Bj�rn O. Roos. The network helps show where Bj�rn O. Roos may publish in the future.

Co-authorship network of co-authors of Bj�rn O. Roos

This figure shows the co-authorship network connecting the top 25 collaborators of Bj�rn O. Roos. A scholar is included among the top collaborators of Bj�rn O. Roos based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Bj�rn O. Roos. Bj�rn O. Roos is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
Roos, Bj�rn O., et al.. (2004). Relativistic quantum chemistry: the multiconfigurational approach. Physical Chemistry Chemical Physics. 6(11). 2919–2919. 338 indexed citations
2.
Gusarov, Sergey, et al.. (2004). Correlation potentials for a multiconfigurational-based density functional theory with exact exchange. Theoretical Chemistry Accounts. 112(2). 84–94. 50 indexed citations
3.
Gagliardi, Laura, Gianfranco La Manna, & Bj�rn O. Roos. (2003). On the reaction of a uranium atom with a nitrogen molecule: a theoretical attempt. Faraday Discussions. 124. 63–63. 38 indexed citations
4.
Roos, Bj�rn O., Per‐Olof Widmark, & Laura Gagliardi. (2003). The ground state and electronic spectrum of CUO: a mystery. Faraday Discussions. 124. 57–57. 30 indexed citations
5.
Ryde, Ulf, Mats H. M. Olsson, Bj�rn O. Roos, & Antonio Carlos Borin. (2001). A theoretical study of the copper-cysteine bond in blue copper proteins. Theoretical Chemistry Accounts. 105(6). 452–462. 56 indexed citations
6.
Gagliardi, Laura, Stefano Evangelisti, Anders Bernhardsson, Roland Lindh, & Bj�rn O. Roos. (2000). Dissociation reaction of N8 azapentalene to 4N2: A theoretical study. International Journal of Quantum Chemistry. 77(1). 311–315. 64 indexed citations
7.
Pierloot, Kristine, Birgit Dumez, Per‐Olof Widmark, & Bj�rn O. Roos. (1995). Density matrix averaged atomic natural orbital (ANO) basis sets for correlated molecular wave functions. Theoretical Chemistry Accounts. 90(2-3). 87–114. 485 indexed citations breakdown →
8.
Roos, Bj�rn O., et al.. (1994). A theoretical determination of the dissociation energy of the nitric oxide dimer. Theoretical Chemistry Accounts. 88(6). 425–435. 37 indexed citations
9.
Borowski, Piotr, et al.. (1993). On the theoretical determination of the electron affinity of ozone. Theoretical Chemistry Accounts. 86(6). 467–476. 16 indexed citations
10.
Roos, Bj�rn O., et al.. (1992). Inclusion of dynamic ?-? polarization in ?-electronab initio calculations. Theoretical Chemistry Accounts. 83(3-4). 191–199. 13 indexed citations
11.
Roos, Bj�rn O., et al.. (1991). A restricted active space (RAS) SCF study of the lifetime of theA 3? state of OH+. Theoretical Chemistry Accounts. 79(2). 81–92. 13 indexed citations
12.
Widmark, Per‐Olof, B. Joakim Persson, & Bj�rn O. Roos. (1991). Density matrix averaged atomic natural orbital (ANO) basis sets for correlated molecular wave functions. Theoretical Chemistry Accounts. 79(6). 419–432. 657 indexed citations breakdown →
13.
Widmark, Per‐Olof, et al.. (1990). Density matrix averaged atomic natural orbital (ANO) basis sets for correlated molecular wave functions. Theoretical Chemistry Accounts. 77(5). 291–306. 1782 indexed citations breakdown →
14.
Sadlej, Joanna & Bj�rn O. Roos. (1989). A quantum chemical study of the hydrogen bonding in the CO2?HF and N2O?HF complexes. Theoretical Chemistry Accounts. 76(3). 173–185. 35 indexed citations
15.
Roos, Bj�rn O., et al.. (1989). A CASSCF-CI study of the coordination of ethylene with iron. Theoretical Chemistry Accounts. 76(1). 33–46. 6 indexed citations
16.
Kell�, Vladimir, Bj�rn O. Roos, & Andrzej J. Sadlej. (1988). Electric properties of the chloride ion. Theoretical Chemistry Accounts. 74(3). 185–194. 24 indexed citations
17.
Roos, Bj�rn O., et al.. (1988). A CASSCF study of the singlet-singlet and triplet-triplet spectroscopy of naphthalene. Theoretical Chemistry Accounts. 74(5). 363–379. 25 indexed citations
18.
Lindh, Roland, et al.. (1988). An ab initio study of the molecular structure and vibration-rotation spectrum of the triplet radical HCCN. Theoretical Chemistry Accounts. 73(2-3). 155–171. 35 indexed citations
19.
Woliński, Krzysztof, Bj�rn O. Roos, & Andrzej J. Sadlej. (1985). Polarized basis sets and the calculation of infrared intensities from nuclear electric shielding tensors. Theoretical Chemistry Accounts. 68(6). 431–444. 33 indexed citations
20.
Diercksen, Geerd H. F., W.P. Kraemer, & Bj�rn O. Roos. (1975). SCF-CI studies of correlation effects on hydrogen bonding and ion hydration. Theoretical Chemistry Accounts. 36(4). 249–274. 276 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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