Tobias Burnus’ Homepage

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Physics

In Mid-March 2009 I joined the research group of Professor Blügel at the Institute of Solid State Research (IFF) at Research Centre Jülich.

In March 2004 I started my Ph.D. studies in the reseach group of Professor L. Hao Tjeng (Lehrstuhl für angewandte Physik, II. Physikalisches Institut, Universität zu Köln, Zülpicher Str. 77, D-50937 Köln). I graduated with a Ph.D. on 25 June 2008, but stayed until February 2009 in Cologne. (L. Hao Tjeng meanwhile moved to the Max Planck Institute for Chemical Physics of Solids in Dresden.)

Between 2003 and 2004 I was in the group of Professor Eberhard K. U.Groß (known as Hardy Gross; Lehrstuhl für theoretische Physik, Physics Department, Freie Universität Berlin, Germany) where I wrote my diploma thesis time-dependent electron localization function (see publications). (Hardy Gross is now at the Max Planck Institute of Microstructure Physics in Halle.)

Between 1998 and 2004 I studied physics at the Freie Universität Berlin, with a short intermezzo at the Dipartimento di Fisica of the Università di Bologna for the spring term of 2001.

Publications

Here you can find all my scientific publications; I wrote also a couple tiny articles in mid 1998 [two-months internship] for Berliner Morgenpost (a Berlin daily newspaper) and I managed to get even into a PRL (74, 5244; 1995) during school time (albeit only in the acknowledgement) – you see I started early.

Copyright notice. Some of the files below contain published material whoses copyright is not mine or not exclusively mine; for these note the following restriction: Readers may view, browse, and/or download material for temporary copying purposes only, provided these uses are for noncommercial personal purposes. Except as provided by law, this material may not be further reproduced, distributed, transmitted, modified, adapted, performed, displayed, published, or sold in whole or part, without prior written permission from the publisher.
Note that for using figures from a publication, you need to obtain both the consent from the publisher and from the author. To make things easier, I hereby grant the right to use figures from my publications for conference posters, for conference/seminar talks, lectures, and (bachelor, master, Ph.D, etc.) theses provided that the figures are properly acknowledged [author name(s), journal title, volume number, page number and year of publication], and that their use is not misleading, and if made available online [e.g. in slides or as broadcasted lecture] these are available without charge. Otherwise, please contact me first.

Reference links

• ReseacherID, Web of Science citation data (as of September 2012): 13 publications, 337 citations, 25.92 citations/item [average] (128, 39, 39, 26, 24, 22, 17, 15, 9, 8, 8, 2, 0), 37.44 citations/year, h-index 9.
• Scorpus, arXiv.org

Articles

1. [2012] Tobias Burnus, Gustav Bihlmayer, Daniel Wortmann, Yuriy Mokrousov, Stefan Blügel and Klaus Michael Indlekofer,
   Electronic properties of graphene nanoribbons under gate electric fields, submitted (2012). OAI: arXiv:1209.5280
2. [2012] Miguel A. L. Marques, Micael J. T. Oliveira, Tobias Burnus,
   Libxc: a library of exchange and correlation functionals for density functional theory, Computer Physics Communications 183, 2272 (2012). OAI: arXiv:1203.1739
3. [2011] Hua Wu, Chun Fu Chang, Olaf Schumann, Zhiwei Hu, Júlio C. Cezar, T. Burnus, Nils Hollmann, Nicholas B. Brookes, Arata Tanaka, Markus Braden, Liu Hao Tjeng, and Daniel I. Khomskii,
   Orbital order in La_0.5Sr_1.5MnO₄: Beyond a common local Jahn-Teller picture, Phys. Rev. B 84, 155126 (2011). OAI: arXiv:1104.3717
4. [2010] Thomas Willers, Zhiwei Hu, Nils Hollmann, Peter O. Korner, Jan Gegner, Tobias Burnus, Hidenori Fujiwara, Arata Tanaka, Detlef Schmitz, Hui-Huang Hsieh, Hong-Ji Lin, Chien-Te Chen, Eric D. Bauer, John L. Sarrao, Eugene Goremychkin, Michael Koza, Liu Hao Tjeng, and Andrea Severing
   Crystal-field and Kondo scale investigation of CeMIn₅ (M = Co, Ir and Rh): a combined x-ray absorption and inelastic neutron study, Physical Review B, 81, 195114 (2010). OAI: arXiv:1003.0300 [PDF (978 KiB)]
5. [2009] Hua Wu (吴骅) and Tobias Burnus
   Spin and orbital states in La_1.5Sr_0.5CoO₄ studied by electronic structure calculations
   Physical Review B, 80, 081105(R) (2009). [PDF (180 KiB)]
6. [2008 ❦] Chun Fu Chang (張春富), Zhiwei Hu (胡志伟), Hua Wu (吴骅), Tobias Burnus, Mohammed Benomar, Arata Tanaka (田中新), Hong-Ji Lin (林宏基), Hui-Huang Hsieh (謝輝煌), Chien-Te Chen (陳建德), and Liu Hao Tjeng
   Spin blockade, orbital occupation, and charge ordering in La_1.5Sr_0.5CoO₄, Physical Review Letters 102, 116401 (2008). OAI: arXiv:0901.3642 [PDF (307 KiB)]
7. [2008] Hua Wu (吴骅), Tobias Burnus, Zhiwei Hu (胡志伟), Christine Martin, Antoine Maignan, Júlio C. Cezar, Nicholas B. Brookes, Arata Tanaka (田中新), and Hao Tjeng,
   Ising magnetism and ferroelectricity in Ca₃CoMnO₆, Physical Review Letters 102, 026404 (2009). OAI: arXiv:0806.1607 [PDF (373 KiB; from PRL)]
8. [2008] Tobias Burnus, Zhiwei Hu (胡志伟), Hua Wu (吴骅), Júlio C. Cezar, Seiji Niitaka, Hidenori Takagi, Chun Fu Chang (張春富), Nicholas B. Brookes, Hong-Ji Lin (林宏基), Ling-Yun Jang (張凌雲), A. Tanaka (田中新), Keng S. Liang (梁耕三), Chien-Te Chen (陳建德), Liu Hao Tjeng,
   X-ray absorption and x-ray magnetic dichroism study on Ca3CoRhO6 and Ca₃FeRhO₆. Phys. Rev. B 77, 205111 (2008). OAI: arXiv:0803.0293 [PDF (341 KiB; from PRB)] [Abstract, references and papers citing this one]
9. [2008] Muhammed A. (Suman) Hossain, Zhiwei Hu (胡志伟), Maurits W. Haverkort, Tobias Burnus, Chun Fu Chang (張春富), Stefan Klein, Jonathan D. Denlinger, Hong-Ji Lin (林宏基), Chien-Te Chen (陳建德), Roland Mathieu, Y. Kaneko, Yoshinori Tokura, S. Satow, Y. Yoshida, Hidenori Takagi, Arata Tanaka (田中新), Ilya S. Elfimov, George A. Sawatzky, L. Hao Tjeng and Andrea Damascelli,
   Crystal-field level inversion in lightly Mn-doped Sr₃Ru₂O₇, Phys. Rev. Lett. 101 (2008). OAI: arXiv:0801.2995 [PDF (341 KiB; from PRB)] [Abstract, references and papers citing this one]
10. [2008] Tobias Burnus, Zhiwei Hu (胡志伟), Hui-Huang Hsieh, V. L. Joseph Joly, P. A. Joy, Maurits W. Haverkort, Hua Wu (吴骅), Arata Tanaka (田中新), Hong-Ji Lin (林宏基), Chien-Te Chen (陳建德) and L. Hao Tjeng,
    Local electronic structure and magnetic properties of LaMn_0.5Co_0.5O₃ studied by x-ray absorption and magnetic circular dichroism spectroscopy, Phys. Rev. B 77, 125124 (2008). OAI: arXiv:0709.3243 [PDF (501 KiB; from PRB)] [Abstract, references and papers citing this one]
11. [2006] Tobias Burnus, Zhiwei Hu (胡志伟), Maurits W. Haverkort, Júlio C. Cezar, Delphine Flahaut, Vincent Hardy, Antoine Maignan, Nicholas B. Brookes, Arata Tanaka (田中新), Hui-Huang Hsieh, Hong-Ji Lin (林宏基), Chien-Te Chen (陳建德) and L. Hao Tjeng,
    Valence, spin, and orbital state of Co ions in one-dimensional Ca₃Co₂O₆: An x-ray absorption and magnetic circular dichroism study, Phys. Rev. B 74, 245111 (2006). OAI: arXiv.org:cond-mat/0611545 [PDF (340 KiB; from PRB)] [Abstract, references and papers citing this one]
12. [2006] Hua Wu (吴骅), Zhiwei Hu (胡志伟), Tobias Burnus, Jonathan D. Denlinger, Peter G. Khalifah, David G. Mandrus, Ling-Yun Jang (張凌雲), Hui-Huang Hsieh, Arata Tanaka (田中新), Keng S. Liang (梁耕三), Jim W. Allen, Robert J. Cava, Daniel I. Khomskii and L. Hao Tjeng,
    Orbitally driven spin-singlet dimerization in S = 1 La₄Ru₂O₁₀, Phys. Rev. Lett. 96, 256402 (2006). OAI: arXiv.org:cond-mat/0606445 [PDF (530 KiB)] [Abstract, references and papers citing this one]
13. [2006] Maurits W. Haverkort, Zhiwei Hu (胡志伟), Júlio C. Cezar, Tobias Burnus, Helena Hartmann, Marco Reuther, C. Zobel, Thomas Lorenz, Arata Tanaka (田中新), Nicholas B. Brookes, Hui-Huang Hsieh, Hong-Ji Lin (林宏基), Chien-Te Chen (陳建德) and L. Hao Tjeng,
    Spin State Transition in LaCoO₃ Studied Using Soft X-ray Absorption Spectroscopy and Magnetic Circular Dichroism, Phys. Rev. Lett. 97, 176405 (2006). OAI: arXiv.org:cond-mat/0610457 [PDF (561 KiB)] [Abstract, references and papers citing this one]
14. [2005] Szilárd I. Csiszar, Maurits W. Haverkort, Tobias Burnus, Zhiwei Hu (胡志伟), Arata Tanaka (田中新), Hui-Huang Hsieh, Hong-Ji Lin (林宏基), Chien-Te Chen (陳建德), Tjipke Hibma and Liu Hao Tjeng,
    Aligning spins in antiferromagnetic films using antiferromagnets (unpublished, 2005). Submitted. OAI: arXiv.org:cond-mat/0504520v2 [PDF (561 KiB; from arXiv.org)] [Abstract, references and papers citing this one]
15. [2004] Tobias Burnus, Miguel A. L. Marques and Eberhard K. U. Gross,
    Time-dependent electron localization function. Physical Review A, 71, 010501(R) (2005). DOI: 10.1103/PhysRevA.71.010501). OAI: arXiv.org:physics/0404126. Supplemental information available (and partially at AIP's EPAPS). [PDF (552 kiB)] [Abstract, references and papers citing this one]

Non-physics-related article

1. [Fortran, 2009] Tobias Burnus, Fortran 2003 & 2008 poll, ACM SIGPLAN Fortran Forum, 28, 21 (2009). DOI: 10.1145/1570522.1570526. (Based on my Fortran poll and adapted for Fortran Forum by Ian D. Chivers.)

In a book

• [2012] Tobias Burnus, Gustav Bihlmayer, Daniel Wortmann, Ersoy Şaşıoğlu, Yuri Mokrousov, Stefan Blügel and K. Michael Indlekofer, p. 469. In: Frontiers in Electronic Materials, Ed. by Jörg Heber, Darrell Schlom, Yoshinori Tokura, Rainer Waser and Matthias Wuttig, Wiley-VCH, 2012. ISBN 978-3-527-41191-7 [MetaSearch, WorldCat].
• [2007] Alberto Castro, Tobias Burnus, Miguel A. L. Marques, Eberhard K. U. Gross,
  Time-Dependent electron localization function: A tool to visualize and analyze ultra fast processes.
  In: Analysis and Control of Ultrafast Processes, Ed. by Oliver Kühn and Ludger Wöste, Springer Series in Chemical Physics Vol. 87, Springer, Heidelberg, 2007. ISBN 978-3-540-68037-6 [SpringerLink, Meta search, WorldCat] DOI: 10.1007/978-3-540-68038-3_6

Theses

• [2008] Tobias Burnus,
  Study of Charge, Spin, and Orbital States in Novel Transition-Metal Oxides Using X-Ray Absorption Spectroscopy,
  Dissertation/Ph.D. thesis, Universität zu Köln (Cologne, Germany), 2008. Adviser: Prof. Dr. L. Hao Tjeng. (Disputation/doctoral defense on 25 June 2008)
  Electronic version: KUPS, DNB (PDF, 11.7 KiB; May 2010 – reprint with minor corrections. Due to hyperlinks, the page breaks can be slightly differ from the printed version)
  Printed version: See e.g. Deutsche Nationalbibliothek (DE), British Library (UK) or WorldCat (DE/UK) or [CH:1, DE:2, 3, 3a, 3b, 4, 5, 6, US:7a, 7b, A:8, NL:9, FI: 10]
  Abstract, Table of Contents, Erratum 1 (October 2008; corrected in the electronic version)
• [2004] Tobias Burnus,
  Time-dependent electron localization function,
  Diplomarbeit (approx. Master Thesis), Freie Universität Berlin (Germany), 2004. Adviser: Prof. Dr. Eberhard K. U. Groß. [Abstract (html)] [PDF (5.6 MiB)]
  When refering to the thesis, please link to the deposit server (permanent link) of the Deutsche Nationalbibliothek (German National Library). The IDN is 98587676X and the OCLC is 184991578. [Thesis License, see also impress in the PDF]

Talks

(This list is notoriously incomplete.)

• [2008] Study of Charge, Spin, and Orbital States in Novel Transition-Metal Oxides Using X-Ray Absorption Spectroscopy, Tobias Burnus, Disputation/doctoral defense, 25 June 2008, University of Cologne. []
• [2006] LDA and beyond, Tobias Burnus, Diploma & PhD seminar of the SFB 608, 22 November 2006 [PDF, 3.5 MiB]
• [2005] Polarization- and temperature-dependent Ru-L_2,3 XAS study of Ca₂RuO₄, T. Burnus, Z. Hu, T. T. Tran, T. Mizokawa, H. H. Hsieh, L.-Y. Jang, S. Nakatsuji, Y. Maeno, M. Braden, K. S. Liang, and L. H. Tjeng. Presented at the Spring Meeting Dresden 2005 of the Deutsche Physikalische Gesellschaft.
  [Abstract (pdf,52 kiB)] [Slides]
• [2005] Controlling MnO spin direction by antiferromagnetic exchange bias in MnO adjoined CoO, Tobias Burnus, Szilard I. Csiszar, Maurits W. Haverkort, Tjipke Hibma, Arata Tanaka, Hui-Huang Hsieh, Hong-Ji Lin, Chien-Te Chen and Liu Hao Tjeng. Presented in Berlin at the Spring Meeting 2005 of Deutsche Physikalische Gesellschaft.
  [Abstract (pdf,38 kiB)] (Sorry, no slides. Due to measuring in Taiwan during and before the DPG spring meeting, the talk was prepared and given by Maurits Haverkort.)
• [2003] Bonds in motion – the time-dependent electron localization function, Tobias Burnus, Miguel Alexandre Lopes Marques and Eberhard K. U. Gross. Presented at the EXC!TiNG Summer School DFT beyond the ground state, Riksgränsen, Sweden, June 22-30, 2003.
  [Abstract (pdf,24 kiB), slides (pdf, 3.4 MiB)]

Posters

• [2006] Orbitally driven spin-singlet dimerization in S = 1 La₄Ru₂O₁₀. Hua Wu, Z. Hu, T. Burnus, J. D. Denlinger, P. G. Khalifah, D. G. Mandrus, L.-Y. Jang, H. H. Hsieh, A. Tanaka, K. S. Liang, J. W. Allen, R. J. Cava, D. I. Khomskii, and L. H. Tjeng. (Shown at the SFB 608 Workshop 2006.) [Poster (pdf, 4.6 MiB)]. See also Phys. Rev. Lett. 96, 256402, above.

Others

• [2006] M.W. Haverkort and Z. Hu and J.C. Cezar and T. Burnus and H. Hartmann and M. Reuther and C. Zobel and T. Lorenz and A. Tanaka and N.B. Brookes and H.H. Hsieh and H.-J. Lin and C.T. Chen and L.H. Tjeng, Spin state transition in LaCoO₃ studied using soft X-ray absorption spectroscopy and magneic circular dichrosim ESRF Highlights 2006: X-ray Absorption and Magnetic Scattering. [PDF (312 KiB)]

Computers

Between 2000 and 2004 I joined the computer administration service (Zentrale EDV, ZEDV) as student assistant; I mainly co-administrated the Unix systems (Tru64 Unix, (first) FreeBSD and (then) Debian Linux), but also worked on the webserver.

Some other work items and links related to computers (and some also related to physics):

• Hybrid, version 2007-07-24 (GPL/MPL/LGPL): Calculates the hybridization based on Slater-Koster and on Harrison's rule; this is then expanded into spherical harmonics.
• GCC Nightly Builds for x86_64 (AMD64, Intel64/em64t)
• PLOT programs under Linux. I've still to find the ideal software, but here are some links
  • Gnuplot – my favouried since scriptable, quick and using postscript enhanced or mpost it is also quite flexible.
  • QtiPlot – a real Origin clone which works under Linux and Windows, looks quite promissing, but has still to go some way. It has a fork named SciDAVis.
  • LabPlot – seems to be actively developed and quite powerful, but I don't like the graphical interface.
  • SciGraphica – dead since 2001, but seems to be reviving in the last months of 2004; I never tested it.
  • Grace (decent of ACE/gr = Xmgr) – in principle a nicely working plot program, but I never liked it since I failed to get used to the user interface.
  • Origin – a rather expensive Windows program; depending on the its version and the one of WINE/CrossOver Office it might work quite well; I tried Origin 7.5 Demo, but I couldn't install it, Origin 6.0 on the other hand seemes to work reasonable well. Since it is expensive and not scriptable, I never really used it, but for most experimentalists I've met it is really indispensible
  • Igor – another Windows plot program, I've never used or tested; some swear by it as others do for Origins. No idea whether it runs using WINE
  • Others: Mathematica, Maple and other mathematical tools have ploting functionalites; special purpose or small (?) programs exists as well (KPlot, XGraph, XGRAPH, kmPlot, OpenDX etc.). In addition, several libraries allow the direct creation of plots, e.g. CERN's Root.
• Qt class for WMF Export makes WMF export as easy
• Linux Libertine Font: Currently my favoured font, created by Phil Poll. I maintain an Inofficial Linux-Liberine-Font Page
• Linux Standard Base: Since I wrote several init scripts, I became interested in this section of the LSB. Most ideas are now in LSB 2.0, but the test cases are still to be written.
• Bugzilla: In order to track bugs at the ZEDV, I set up a bugzilla; it was never really used, but I ended up writing patches and maintaining the Bugzilla-de project.
• xmotd: In order to annoy, well, to inform the users, I wrote a small perl program which displays (new) messages when one logs in - and stays quite otherwise.
• Octopus and optwo: During my diploma theses I used Octopus to calculate the TDELF, but I contributed only a few patches (mostly documentation). optwo is my own child, but this Fortran9x program is not that facy; this simple optimal-control program, which takes the potential from octopus and works only for cylindrical molecules, is available upon request.
• ConT_EXt: When I need to typeset something, I use ConTeXt rather than LaTeX or a WordProcessor. (I contributed only little.)
• Betatesting: I think I'm rather good at beta testing software. Until pdftex appeared, I tried to get a working ps2pdf by bugging Peter Deutsch (creator of Ghostscript). Well, it worked rather well. Other than that I'm mainly a SUSE Linux beta tester.

Some stuff

• Fachschaftsinitiative (FSI) at the Physics Department of the Freie Universität: Well, I still have some links to them. (Up to now, I don't have anything to do with the Fachschaft Physik der Universität zu Köln.)
• Handbücher der ZEDV: Benutzereinführung

Contact

Research Centre Jülich
IFF 1 – Institute for Solid State Research & IAS 1 – Institute for Advanced Simulation
52425 Jülich
Germany

Or send an email to burnus at net-b.de

© 1998–2010 Tobias Burnus