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Staff profile

Overview

Dr Roger Johnson

Associate Professor

Affiliations
Affiliation
Associate Professor in the Department of Physics

Research interests

  • Our research group works on the experimental determination of structure-property relationships in quantum materials and their theoretical interpretation via phenomenological group and Landau theories.
  • At present we are focused on altermagnetism, magneto-orbital physics and related instabilities in perovskite-derived oxides, intermetallic topological magnets, and model quantum magnets engineered from coordination polymers.
  • Our research involves experiments at large-scale central facilities such as the ISIS Neutron and Muon Source (UK), ILL European Neutorn Source (France), Diamond Light Source (UK), and the European Synchrotron Radiation Facility (France).

Esteem Indicators

  • 2025: Honorary Professor, UCL:
  • 2024: American Physical Society Outstanding Referee:
  • 2018: BTM WIllis Prize 2018:
  • 2016 - 2021: Royal Society University Research Fellowship:
  • 2014: BCA-IOP Physical Crystallography Prize:
  • 2010: Keith Nicholas Prize:

Publications

Journal Article

  • Magnetic field induced ordering in the spin-½ chiral chain compound [Cu(pym)(H₂O)₄]SiF₆·H₂O
    Scatena, R., Hernández-Melián, A., Huddart, B. M., Curley, S., Williams, R. C., Manuel, P., Blundell, S. J., Guguchia, Z., Manson, Z. E., Manson, J. L., Noe, G. T., Singleton, J., Lancaster, T., Goddard, P. A., & Johnson, R. D. (2025). Magnetic field induced ordering in the spin-½ chiral chain compound [Cu(pym)(H₂O)₄]SiF₆·H₂O. Physical Review B, 112(5), Article 054414. https://doi.org/10.1103/w195-6pjw
  • Magnetic properties of a staggered S=1 chain with an alternating single-ion anisotropy direction
    Vaidya, S., Curley, S. P. M., Manuel, P., Stewart, J. R., Le, M. D., Balz, C., Shiroka, T., Blundell, S. J., Wheeler, K. A., Calderon-Lin, I., Manson, Z. E., Manson, J. L., Singleton, J., Lancaster, T., Johnson, R. D., & Goddard, P. A. (2025). Magnetic properties of a staggered S=1 chain with an alternating single-ion anisotropy direction. Physical Review B, 111, Article 014421. https://doi.org/10.1103/physrevb.111.014421
  • Pseudo-easy-axis anisotropy in antiferromagnetic S=1 diamond-lattice systems
    Vaidya, S., Hernández-Melián, A., Tidey, J. P., Curley, S. P. M., Sharma, S., Manuel, P., Wang, C., Hannaford, G. L., Blundell, S. J., Manson, Z. E., Manson, J. L., Singleton, J., Lancaster, T., Johnson, R. D., & Goddard, P. A. (2024). Pseudo-easy-axis anisotropy in antiferromagnetic S=1 diamond-lattice systems. Physical Review B, 110(17). https://doi.org/10.1103/physrevb.110.174438