Ray Osborn is a Senior Physicist the Neutron and X-ray Scattering Group in the Materials Science Division of Argonne National Laboratory, where he has worked since 1992.

His research is in the field of strongly correlated electron systems probing spin, charge and orbital correlations using neutrons and x-rays. His scientific interests have included quantum critical scaling in non-Fermi liquid compounds, the role of polaron correlations in colossal magnetoresistance, dynamic frustration in rare earth spin glasses, electron-phonon coupling in charge-density-waves, and the competition between magnetism and superconductivity in iron arsenides. He has also been active in developing new instrumental techniques to further his research goals, such as the development of more efficient methods of measuring single crystal diffuse scattering both with neutrons and high-energy x-rays. In collaboration with Stephan Rosenkranz, he was responsible for the proposal and conceptual design of the Corelli diffractometer at the Spallation Neutron Source.

Osborn, who has more than 190 publications with over 6000 citations, is a Fellow of the American Physical Society and the Neutron Scattering Society of America, and was awarded the University of Chicago Distinguished Performance Award in 2006 for his CMR research. He was a scientific director of the National School of Neutron and X-ray Scattering for seven years. He was one of the original developers of the NeXus data format as a standard for neutron and x-ray scattering data and was the founding chair of the NeXus International Advisory Committee.

Awards, Honors and Memberships

• Fellow of the American Physical Society
• Fellow of the Neutron Scattering Society of America
• University of Chicago Distinguished Performance Award (2006)

Education

• Physics, B.Sc. with 1^st Class Honours, Imperial College of Science and Technology, London, UK, 1979
• Solid State Physics, Ph.D., University of Southampton, UK, 1989

Professional Service

• Scientific Director, National School of Neutron and X-ray Scattering (2001-2007).
• Chair, Publication Committee, International Conference on Strongly Correlated Electron Systems, Ann Arbor, MI (2001).
• Chair, NeXus International Advisory Committee (2003-2006).
• Organizer, Workshop on ​“Competing Interactions and Colossal Responses in Transition Metal Compounds,” Telluride, CO (2006).
• Member, International Advisory Board, International Conference on Strongly Correlated Electron Systems.
• Member, International Advisory Board, International Collaboration on Advanced Neutron Sources.
• Member, Publication Committee, International Conference on Neutron Scattering, Sydney.
• Member, International Advisory Committee, Workshop on ​“New Opportunities for Better User Group Software”.

Selected Invited Talks

• Challenges in Studying Correlated Disorder
  Workshop on ​“Machine Learning Quantum Matter Data”
  Simons Foundation, New York, NY, January 23-24, 2020
• Coherent Band Excitations Studied With Inelastic Neutron Scattering
  International Conference on Magnetism (ICM 2018)
  San Francisco, CA, July 15-20, 2018
• Coherent Band Excitations in CePd₃
  2018 March Meeting of the American Physical Society
  Los Angeles, CA, March 5–9, 2018
• Imaging Nanoscale Disorder in Reciprocal Space
  
APS Colloquium

  Argonne, IL, January 11, 2017
• Evidence for Itinerant Magnetism in the C₄ Phase of Hole-Doped Iron Arsenides
  
International Conference on ​“Spectroscopies in Novel Superconductors”

  Stuttgart, Germany, June 19-24, 2016
• A Reentrant C₄ Phase in Hole-Doped BaFe₂As₂
  
11^th International Conference on Materials & Mechanisms of Superconductivity

  Geneva, Switzerland, August 23-28, 2015
• A New Magnetic Phase in Hole-Doped BaFe₂As₂: Implications for the Origin of Nematicity 
  
2015 March Meeting of the American Physical Society
  San Antonio, TX, 
March 2–6, 2015
• Novel Magnetic States Close to the Quantum Phase Transition in Iron Pnictides 

  Workshop on Quantum Criticality in Correlated Materials and Model Systems
  Natal, Brazil, 
July 21–31, 2014
• Neutron Scattering as a Probe of Fermi Surface Nesting in Iron-Based Superconductors 

  2013 March Meeting of the American Physical Society

  Baltimore, MD, March 18–22, 2013
• Unconventional superconductivity in hole-doped BaFe₂As₂ from inelastic neutron scattering
  Materials and Mechanisms of Superconductivity Conference (M2S 2012)

  Washington, DC, July 29-August 3, 2012
• Unconventional Superconductivity Cast in Iron 

  25^th Anniversary Symposium of EPL
  
Munich, Germany, May 2-4, 2011
• The Effect of Fermi Surface Nesting on Resonant Spin Excitations in Ba_1-xK_xFe₂As₂ 

  13^th International Workshop on Vortex Matter in Superconductors

  Chicago, July 31-August 5, 2011
• The Doping Dependence of Resonant Spin Excitations in Ba_1-xK_xFe₂As₂ 
  Workshop on Emergent Quantum States in Complex Correlated Matter
  Dresden, Germany, August 23 - 27, 2010
• Resonant Spin Excitations in Iron Arsenide Superconductors
  Workshop on Competing Interactions and Colossal Responses in Transition Metal Compounds
  Telluride, CO, August 10-14, 2009
• Resonant Spin Excitations in Iron Arsenide Superconductors
  International Workshop on Iron Related High-T_c Superconductors
  Tokyo, Japan, Jan. 28^th, 2009.
• Spin glass order induced by dynamic frustration in PrAu₂Si₂
  IOP Meeting on Theoretical and Experimental Magnetism
  Abingdon, UK, August 11-12, 2008
• Corelli: Single Crystal Diffraction with Elastic Discrimination
  International Conference on Neutron Scattering
  Sydney, Australia, November 27-December 2, 2005
• The Coupling of Spin and Orbital Degrees of Freedom in a Layered Ruthenate: An Inelastic Neutron Scattering Study
  2004 MRS Fall Meeting
  Boston, MA, November 29-December 3, 2004
• Prospects for Single Crystal Diffuse Scattering with Elastic Discrimination
  American Conference on Neutron Scattering
  College Park, MD, June 6-10, 2004.
• Polarized Neutron Studies of Quantum Critical Scaling
  Workshop on Polarised Neutrons and Synchrotron X-rays for Magnetism
  Venice, Italy, August 4-6, 2003.
• Nanoscale Frustration: Competing Charge, Orbital, and Magnetic Order in Layered CMR Manganites
  2002 Annual Meeting of the American Crystallographic Association
  San Antonio, TX, May 25-30, 2002
• Phonons and Superconductivity in MgB₂
  2002 March Meeting of the American Physical Society
  Indianapolis, IN, March 18-22, 2002
• Magnetic Inelastic Neutron Scattering - Present Results and Future Trends
  International Workshop on Science in Neutron-arena of JHP
  Tsukuba, Japan, March 26-27, 1996
• Non-Fermi Liquid Effects in f-Electron Materials
  1996 March Meeting of the American Physical Society
  St. Louis, MO, March 18-22, 1996

Selected Publications

• Reciprocal Space Imaging of Ionic Correlations in Intercalation Compounds
  M. J. Krogstad, S. Rosenkranz, J. M. Wozniak, G. Jennings, J. P. C. Ruff, J. T. Vaughey, and R. Osborn
  Nat Mater 19, 63 (2020)
• The relation of local order to material properties in relaxor ferroelectrics
  M. J. Krogstad, P. M. Gehring, S. Rosenkranz, R. Osborn, F. Ye, Y. Liu, J. P. C. Ruff, W. Chen, J. M. Wozniak, H. Luo, O. Chmaissem, Z.-G. Ye, and D. Phelan
  Nat Mater 48, 1 (2018).
• Coherent Band Excitations in CePd₃: A Comparison of Neutron Scattering and ab initio Theory
  E. A. Goremychkin, H.-W. Park, R. Osborn, S. Rosenkranz, J.-P. Castellan, V. R. Fanelli, A. D. Christianson, M. B. Stone, E. D. Bauer, K. J. McClellan, D. D. Byler, J. M. Lawrence
  Science 359, 186 (2018).
• Double-Q spin-density wave in iron arsenide superconductors
  J. M. Allred, K. M. Taddei, D. E. Bugaris, M. J. Krogstad, S. H. Lapidus, D. Y. Chung, H. Claus, M. G. Kanatzidis, D. E. Brown, J. Kang, R. M. Fernandes, I. Eremin, S. Rosenkranz, O. Chmaissem, and R. Osborn

  
Nat Phys 12, 493-498 (2016).
• Emergence of coherence in the charge-density wave state of 2H-NbSe₂
  U. Chatterjee, J. Zhao, M. Iavarone, R. Di Capua, J.-P. Castellan, G. Karapetrov, C. D. Malliakas, M. G. Kanatzidis, H. Claus, J. P. C. Ruff, F. Weber, J. van Wezel, J.-C. Campuzano, R. Osborn, M. Randeria, N. Trivedi, M. R. Norman, and S. Rosenkranz

  
Nat Comm 6, 6313 (2015).
• Magnetically driven suppression of nematic order in an iron-based superconductor 
  S. Avci, O. Chmaissem, J.M. Allred, S. Rosenkranz, I. Eremin, A.V. Chubukov, D.E. Bugaris, D.Y. Chung, M.G. Kanatzidis, J.-P Castellan, J.A. Schlueter, H. Claus, D.D. Khalyavin, P. Manuel, A. Daoud-Aladine and R. Osborn
  Nat Comm 5, 3845 (2014).
• Chiral Phase Transition in Charge Ordered 1T-TiSe₂ 
  John-Paul Castellan, Stephan Rosenkranz, Ray Osborn, Qing’an Li, K. E. Gray, X. Luo, U. Welp, Goran Karapetrov, J. P. C. Ruff, and Jasper van Wezel
  Phys Rev Lett 110, 196404 (2013).
• Phase diagram of Ba_1−xK_xFe₂As₂ 
  S. Avci, O. Chmaissem, D. Y. Chung, S. Rosenkranz, E. A. Goremychkin, J.-P. Castellan, I. S. Todorov, J. A. Schlueter, H. Claus, A. Daoud-Aladine, D. D. Khalyavin, M. G. Kanatzidis, and R. Osborn
  Phys Rev B 85, 184507 (2012).
• Electron-Phonon Coupling and the Soft Phonon Mode in TiSe₂ 
  F. Weber, S. Rosenkranz, J.-P. Castellan, R. Osborn, G. Karapetrov, R. Hott, R. Heid, K.-P. Bohnen, and A. Alatas
  Phys Rev Lett 107, 266401 (2011).
• Effect of Fermi Surface Nesting on Resonant Spin Excitations in Ba_1-xK_xFe₂As₂
  J.-P. Castellan, S. Rosenkranz, E. Goremychkin, D. Chung, I. Todorov, M. Kanatzidis, I. Eremin, J. Knolle, A. V. Chubukov, S. Maiti, M. Norman, F. Weber, H. Claus, T. Guidi, R. I. Bewley, and R. Osborn
  Phys Rev Lett 107, 177003 (2011).
• The Transition from Heavy Fermion to Mixed Valence in Ce_1−xY_xAl₃: A Quantitative Comparison with the Anderson Impurity Model 
  E. A. Goremychkin, R. Osborn, I. L. Sashin, P. Riseborough, B. D. Rainford, D. T. Adroja, J. M. Lawrence
  Phys Rev Lett 104, 176402 (2010).
• Inelastic neutron scattering studies of the spin and lattice dynamics in iron arsenide compounds 
  R. Osborn, S. Rosenkranz, E. A. Goremychkin, A. D, Christianson
  Physica C 469, 498-506 (2009).
• Two-dimensional resonant magnetic excitation in BaFe_1.84Co_0.16As₂
  M. D. Lumsden, A. D. Christianson, D. Parshall, M. B. Stone, S. E. Nagler, G. J. Macdougall, H. A. Mook, K. Lokshin, T. Egami, D. L. Abernathy, E. A. Goremychkin, R. Osborn, M. A. McGuire, A. S. Sefat, R. Jin, B. C. Sales, D. Mandrus
  Phys Rev Lett 102, 107005 (2009).
• Unconventional superconductivity in Ba_0.6K_0.4Fe₂As₂ from inelastic neutron scattering
  A. D. Christianson, E. A. Goremychkin, R. Osborn, S. Rosenkranz, M. D. Lumsden, C. D. Malliakas, I. S. Todorov, H. Claus, D. Y. Chung, M. G. Kanatzidis, R. I. Bewley, and T. Guidi
  Nature 456, 930-932 (2008).
• Spin-glass order induced by dynamic frustration
  E. A. Goremychkin, R. Osborn, B. D. Rainford, R. T. Macaluso, D. T. Adroja, and M. Koza
  Nat Phys 4, 766-770 (2008).
• Reentrant orbital order and the true ground state of LaSr₂Mn₂O₇
  Q. Li, K. E. Gray, H. Zheng, H. Claus, S. Rosenkranz, S. N. Ancona, R. Osborn, J. F. Mitchell, Y. Chen and J. W. Lynn
  Phys Rev Lett 98, 167201 (2007).
• First-order metal-insulator transitions in manganites: Are they universal?
  Q. A. Li, K. E. Gray, S. N. Ancona, H. Zheng, S. Rosenkranz, R. Osborn and J. F. Mitchell
  Phys Rev Lett 96, 087201 (2006).
• Crystal field potential of PrOs₄Sb₁₂: Consequences for superconductivity
  E. A. Goremychkin, R. Osborn, E. D. Bauer, M. B. Maple, N. A. Frederick, W. M. Yuhasz, F. M. Woodward and J. W. Lynn
  Phys Rev Lett 93, 157003 (2004).
• Orbital ordering transition in La₄Ru₂O₁₀
  P. Khalifah, R. Osborn, Q. Huang, H. W. Zandbergen, R. Jin, Y. Liu, D. Mandrus and R. J. Cava
  Science 297, 2237-2240 (2002).
• Magnetic correlations and the anisotropic Kondo effect in Ce_1-xLa_xAl₃
  E. A. Goremychkin, R. Osborn, B. D. Rainford, T. A. Costi, A. P. Murani, C. A. Scott and P. J. C. King
  Phys Rev Lett 89, 147201 (2002).
• Structure of nanoscale polaron correlations in La_1.2Sr_1.8Mn₂O₇
  B. J. Campbell, R. Osborn, D. N. Argyriou, L. Vasiliu-Doloc, J. F. Mitchell, S. K. Sinha, U. Ruett, C. D. Ling, Z. Islam and J. W. Lynn
  Phys Rev Lett 65, 014427 (2002).
• Phonon density of states in MgB₂
  R. Osborn, E. A. Goremychkin, A. I. Kolesnikov and D. G. Hinks
  Phys Rev Lett 87, 017005 (2001).
• Magnetic correlations and the quantum critical point of UCu_5-xPd_x (x = 1, 1.5)
  M. C. Aronson, R. Osborn, R. Chau, M. B. Maple, B. D. Rainford and A. P. Murani
  Phys Rev Lett 87, 197205 (2001).
• Evidence for Anisotropic Kondo Behavior in Ce_0.8La_0.2Al₃ E. A. Goremychkin, R. Osborn, B. D. Rainford and A. P. Murani
  Phys Rev Lett 84, 2211-2214 (2000).
• Charge melting and polaron collapse in La_1.2Sr_1.8Mn₂O₇
  L. Vasiliu-Doloc, S. Rosenkranz, R. Osborn, S. K. Sinha, J. W. Lynn, J. Mesot, O. H. Seeck, G. Preosti, A. J. Fedro and J. F. Mitchell
  Phys Rev Lett 83, 4393-4396 (1999).
• Neutron scattering investigation of magnetic bilayer correlations in La_1.2Sr_1.8Mn₂O₇: Evidence of Canting above T_C
  R. Osborn, S. Rosenkranz, D. N. Argyriou, L. Vasiliu–Doloc, J. W. Lynn, S. K. Sinha, J. F. Mitchell, K. E. Gray and S. D. Bader
  Phys Rev Lett 81, 3964-3967 (1998).
• Non-Fermi liquid scaling of the magnetic response in UCu_5-xPd_x (x=1,1.5)
  M. C. Aronson, R. Osborn, R. A. Robinson, J. W. Lynn, R. Chau, C. L. Seaman and M. B. Maple Phys Rev Lett 75, 725-728 (1995).
• Crystal-Field Excitations in CeCu₂Si₂
  E. A. Goremychkin and R. Osborn
  Phys Rev Lett 47, 14280-14290 (1993).
• Intermultiplet transitions using neutron spectroscopy
  R. Osborn, S. W. Lovesey, A. D. Taylor and E. Balcar
  Handbook on the Physics and Chemistry of Rare Earths, edited by K. A. Gschneidner, Jr. and L. Eyring (North-Holland, Amsterdam, 1991), Vol. 14, p. 1-61.
• Intermultiplet transitions in praseodymium using neutron spectroscopy
  A. D. Taylor, R. Osborn, K. A. McEwen, W. G. Stirling, Z. A. Bowden, W. G. Williams, E. Balcar and S. W. Lovesey
  Phys Rev Lett 61, 1309-1312 (1988).
• Observation of oxygen Frenkel disorder in uranium dioxide above 2000K by use of neutron-scattering techniques
  K. Clausen, W. Hayes, J. E. Macdonald, R. Osborn and M. T. Hutchings
  Phys Rev Lett 52, 1238 (1984).