At ISIS I am the head of the Diffraction and Muons division.
I have a long-standing interest in the development of software for analysis and visualisation of data from time-of-flight chopper spectrometers, specifically the Horace software package. You can read more about the software, and the technique of collecting four-dimensional inelastic neutron scattering datasets, here:
"Horace: Software for the analysis of data from single crystal spectroscopy experiments at time-of-flight neutron instruments", Nucl. Inst. Meth. 834, 132-142 (2016)
I am also interested in finding new ways of improving the capabilities of the neutron instruments at ISIS, e.g. with improved neutron optics, as well as developing novel sample environment for experiments. An example of the latter is the work done by Richard Waite, whom I co-supervised at Bristol University with Prof. Stephen Hayden, on devices that can apply uniaxial strain to samples being studied with neutron beams. On the former, I was responsible for the 2017/18 upgrade to the MAPS spectrometer, which you can read about here:
"Upgrade to the MAPS neutron time-of-flight chopper spectrometer", Rev. Sci. Inst. 90, 035110 (2019)
Scientifically I am interested in the physics of strongly correlated transition metal oxides, which exhibit all manner of interesting emergent properties such as superconductivity or multiferroicity. My recent focus has been a collaboration with Chris Stock at Edinburgh University and Harry Lane at St Andrews University to marry advanced theoretical modelling of such materials with neutron scattering data.
The following selected papers provide some examples of the work I have done:
"Neutron scattering sum rules, symmetric exchanges, and helicoidal magnetism in MnSb2O6", Phys. Rev. B 107, 144420 (2023)
"Brill, a Brillouin neutron spectrometer at ISIS", Nucl. Inst. Meth. A 1052, 168289 (2023)
"Excitonic transverse and amplitude fluctuations in noncollinear and charge-ordered RbFe2+Fe3+F6", Phys. Rev. B 106, 054431 (2022)
"Metastable antiphase boundary ordering in CaFe2O4", Phys. Rev. B 104, 104404 (2021)
"Two-dimensional ferromagnetic spin-orbital excitations in honeycomb VI3", Phys. Rev. B 104, L020411 (2021)
"Nonlinear soliton confinement in weakly coupled antiferromagnetic spin chains", Phys. Rev. B 102, 024437 (2020)
"Spin-orbit excitons in CoO", Phys. Rev. B 100, 075143 (2019)
"The full magnon spectrum of yttrium iron garnet", NJP Quantum Materials 2, 63 (2017)
"Solitary Magnons in the S=5/2 Antiferromagnet CaFe2O4", Phys. Rev. Lett. 117, 017201 (2016)
“Spin resonance in the superconducting state of Li1-xFexODFe1-ySe observed by neutron spectroscopy”, Phys. Rev. B 94, 144503 (2016)
"Spin excitations used to probe the nature of exchange coupling in the magnetically ordered ground state of Pr0.5Ca0.5MnO3", Phys. Rev. B 94, 014405 (2016)
"Strong (pi,0) spin fluctuations in beta-FeSe observed by neutron spectroscopy", Phys. Rev. B 91, 180501 (2015)
"Spin fluctuations away from (pi,0) in the superconducting phase of molecular-intercalated FeSe", Phys. Rev. B 87, 220508 (2013)
"Spin-wave excitations and superconducting resonant mode in CsxFe2-ySe2", Phys. Rev. B 86, 094528 (2012)
"Magnetic structure of DyMn2O5 determined by resonant x-ray scattering", Phys. Rev. B 85, 224403 (2012)
"Antiferromagnetic spin fluctuations in LiFeAs observed by neutron scattering", Phys. Rev. B 83, 220514(R) (2011)
"Itinerant Spin Excitations in SrFe2As2 Measured By Inelastic Neutron Scattering", Phys. Rev. B 83, 214519 (2011)
"High-energy spin excitations in BaFe2As2 observed by inelastic neutron scattering", Phys. Rev. B 78, 220501(R) (2008)
"X-ray Resonant Diffraction Study of Multiferroic DyMn2O5", Phys Rev B 77, 104415 (2008)
"Nature of the Magnetic Order in the Charge-Ordered Cuprate La1.48Nd0.4Sr0.12CuO4", Phys Rev Lett 98, 197003 (2007)
"X-ray Scattering Study of the Order Parameters in Multiferroic TbMnO3", Phys Rev B 76, 184420 (2007)
