Dr. Jonathan White

photo of Jonathan White Instrument scientist SANS-I, Pressure Devices

Paul Scherrer Institute
WHGA/145
5232 Villigen – PSI
Switzerland

Telephone: +41 56 310 4284
E-mail: jonathan.white@psi.ch





Professional Course

Since 2016 Staff Scientist (Tenured), Laboratory for Neutron Scattering and Imaging, Paul Scherrer Institut, CH
2013-2016 Tenure-Track Scientist, Laboratory for Neutron Scattering and Imaging, Paul Scherrer Institut, CH
2011-2013 Postdoctoral Research Fellow, Laboratory for Quantum Magnetism, ICMP, EPF Lausanne, CH link
2009-2013 Postdoctoral Research Fellow, Laboratory for Neutron Scattering, Paul Scherrer Institut, CH
2006-2009 Ph.D. studies, Condensed Matter Physics Group, Department of Physics and Astronomy, University of Birmingham, UK
Ph.D. Thesis: SANS Investigations of the Flux Line Lattice in Unconventional Superconductors
link
2006 Summer Stagiaire Programme, Institut Laue-Langevin, Grenoble, FR link
2002-2006 MSci in Physics at the University of Birmingham, UK
Masters Thesis: Hybrid Device Structures Based on Normal Metal - High Temperature Superconductor Contacts
link

Interests and Responsibilities

My principal scientific interests are in experimental Condensed Matter Physics, where I use mainly neutron scattering to attack various problems. Topics of current interest include:
  • Topological magnetism in non-centrosymmetric lattices
  • Microscopic mechanisms for magnetoelectric coupling
  • New routes towards coupled ferromagnetism and ferroelectricity in both thin film and bulk materials
  • Interaction between superconductivity and other orders
  • Realization of challenging experiments, e.g. complex sample environments, small sample volumes, pressure experiments.
  • Responsible for the SANS-I instrument at SINQ.
  • Responsible for high pressure neutron sample environment at SINQ.

Selected Publications

Full list at ResearcherID.com

Coupled multiferroic domain switching in the canted conical spin spiral system Mn2GeO4
T. Honda †, J.S. White †, A.B. Harris, L.C. Chapon, A. Fennell, B. Roessli, O. Zaharko, M. Kenzelmann, and T. Kimura
Nature Communications 8, 15457 (2017).

Robust metastable skyrmions and their triangular–square lattice structural transition in a high-temperature chiral magnet
K. Karube †, J.S. White †, N. Reynolds, J.L. Gavilano, H. Oike, A. Kikkawa, F. Kagawa, Y. Tokunaga, H.M. Rønnow, Y. Tokura, and Y. Taguchi
Nature Materials 15, 1237 (2016).

Néel-type Skyrmion Lattice with Confined Orientation in the Polar Magnetic Semiconductor GaV4S8
I. Kézsmárki, S. Bordács, P. Milde, E. Neuber, L.M. Eng, J.S. White, H.M. Rønnow, C.D. Dewhurst, M. Mochizuki, K. Yanai, H. Nakamura, D. Ehlers, V. Tsurkan, and A. Loidl
Nature Materials 14, 1116 (2015).

A new class of chiral materials hosting magnetic skyrmions beyond room temperature
Y. Tokunaga, X.Z. Yu, J.S. White, H.M. Rønnow, D. Morikawa, Y. Taguchi, and Y. Tokura
Nature Communications 6, 7638 (2015).

Electric field-induced Skyrmion distortion and giant lattice rotation in the magnetoelectric insulator Cu2OSeO3
J.S. White, K. Prša, P. Huang, A.A. Omrani, I. Živković, M. Bartkowiak, H. Berger, A. Magrez, J.L. Gavilano, G. Nagy, J. Zang, and H.M. Rønnow
Phys. Rev. Lett. 113, 107203 (2014).

Strain-Induced Ferromagnetism in Antiferromagnetic LuMnO3 Thin Films
J.S. White, M. Bator, Y. Hu, H. Luetkens, J. Stahn, S. Capelli, S. Das, M. Döbeli, Th. Lippert, V.K. Malik, J. Martynczuk, A. Wokaun, M. Kenzelmann, Ch. Niedermayer, and C.W. Schneider
Phys. Rev. Lett. 111, 037201 (2013).

Coupling of Magnetic and Ferroelectric Hysteresis by a Multicomponent Magnetic Structure in Mn2GeO4
J.S. White, T. Honda, K. Kimura, T. Kimura, Ch. Niedermayer, O. Zaharko, A. Poole, B. Roessli, and M. Kenzelmann
Phys. Rev. Lett. 108, 077204 (2012).

Fermi Surface and Order Parameter Driven Vortex Lattice Structure Transitions in Twin-Free YBa2Cu3O7
J.S. White, V. Hinkov, R.W. Heslop, R.J. Lycett, E.M. Forgan, C. Bowell, S. Strässle, A.B. Abrahamsen, M. Laver, C.D. Dewhurst, J. Kohlbrecher, J.L. Gavilano, J. Mesot, B. Keimer, and A. Erb
Phys. Rev. Lett. 102, 097001 (2009).

Superconducting Vortices in CeCoIn5: Toward the Pauli-Limiting Field
A.D. Bianchi, M. Kenzelmann, L. DeBeer-Schmitt, J.S. White, E.M. Forgan, J. Mesot, M. Zolliker, J. Kohlbrecher, R. Movshovich, E.D. Bauer, J.L. Sarrao, Z. Fisk, C. Petrović, and M.R. Eskildsen
Science 319, 177 (2008).

Recent Presentations

Coupled multiferroic domain switching in the canted conical spin spiral system Mn2GeO4 Invited Talk at APCTP Workshop on Multiferroics, Tokyo, JP 09.11.2017
Complex mesoscale magnetic order in the Néel-type skyrmion material GaV4S8 Invited Talk at IUCr Conference 2017, Hyderabad, IN 25.08.2017
Room temperature Skyrmions and Robust Metastable Skyrmion States in Co-Zn-Mn Alloys Invited Talk at VORTEX 2017, Natal, BR 01.06.2017
Room temperature Skyrmions and Robust Metastable Skyrmion States in Co8Zn8Mn4 Invited Talk at DPG Spring Meeting 2017, Dresden, DE 21.03.2017
Skyrmions in magnetic materials Download Tutorial at DPG Spring Meeting 2017, Dresden, DE 19.03.2017
Neutron scattering studies of magnetic Skyrmions below, at, and above room temperature in Co-Zn-Mn alloys Invited Seminar at Department of Physics, ETH Zürich, CH 23.02.2017
Unveiling new properties and phases of magnetic Skyrmions by neutron scattering experiments Invited Talk for the HERCULES School participants that visit PSI 15.04.2016
Unveiling new properties and phases of magnetic Skyrmions by neutron scattering experiments Invited Talk at Workshop on Neutron Scattering to study magnetic, multiferroic and superconducting materials, Bariloche, AR 11.02.2016
Neutron scattering study of magnetism in the polar semiconductor GaV4S8 Invited Talk at Workshop on Topological Phenomena in Noncentrosymmetric Magnets, RIKEN, JP 28.01.2016
Electric Field-Induced Skyrmion Distortion and Giant Lattice Rotation in the Magnetoelectric Insulator Cu2OSeO3 Invited Talk at EMN Hong Kong Meeting 2015, Hong Kong, CN 09.12.2015
Electric Field-Induced Skyrmion Distortion and Giant Lattice Rotation in the Magnetoelectric Insulator Cu2OSeO3 Invited Talk at 5th Swiss-Sino Workshop 2015, Brugg, CH 05.05.2015
Neutron scattering explorations of new magnetoelectric coupling effects at PSI: ferromagnetic ferroelectrics and skyrmion lattices Invited Seminar at Budapest University of Technology and Economics (BUTE), Hungary 30.03.2015

Colleagues


In addition to other LNS members, I also work with the below-listed scientists and their group members. Please take a moment to visit their webpages.
Dr. M. Bartkowiak, LDM, PSI link
Prof. S. Bordács, BUTE, Hungary link
Prof. J. Chang, Universität Zürich link
Dr. R. Cubitt, Dr. C.D. Dewhurst, Institut Laue-Langevin, France link
Prof. M.R. Eskildsen, University of Notre Dame, USA link
Prof. M. Fiebig, ETH Zürich link
Prof. E.M. Forgan, University of Birmingham, UK link
Dr. T. Honda, High Energy Accelerator Research Organization (KEK), Japan link
Prof. I. Kézsmárki, Universität Augsburg, Germany link
Prof. T. Kimura, Department of Applied Physics, University of Tokyo, Japan link
Prof. H.M. Rønnow, Dr. I. Živković, LQM, EPF Lausanne link
Prof. T.J. Sato, Dr. D. Okuyama, Tohoku University, Japan link
Prof. Y. Tokura, Prof. S. Ishiwata, Dr. N. Kanazawa, Department of Applied Physics, University of Tokyo, Japan link
Prof. Y. Tokura, Prof. Y. Taguchi, Prof. S. Seki, Dr. K. Karube, Dr. R. Takagi, RIKEN CEMS, Wako, Japan link
Prof. Y. Yasui, Meiji University, Japan link