Dr. Jonathan White

Instrument scientist SANS-I, Pressure Devices

Paul Scherrer Institute
Forschungsstrasse 111
5232 Villigen PSI
Switzerland
Telephone
+41 56 310 42 84




Since 2016 Senior 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, EPFL, 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
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.
  • Title: Creation and exploration of high-density topological skyrmion phases in 4f magnets, Role: PI, Sponsor: SNSF (Project), Funds: 0.46 MCHF, Starting 2020
  • Title: Discovery and Nanoengineering of Novel Skyrmion-hosting materials, Role: co-PI (with Prof. D. Grundler (EPFL, PI), Prof. O. Yazyev (EPFL, co-PI) and Prof. M. Poggio (UBasel, co-PI)), Sponsor: SNSF (Sinergia), Funds: 2.7 MCHF (personal share 0.7 MCHF), Oct 2017 to Sep 2021 - Project website hosted by EPFL
  • Title: Exploration of emerging magnetoelectric coupling effects in new materials, Role: PI, Sponsor: SNSF (Project), Funds: 0.2 MCHF, Jul 2015 to Jun 2018

Full list at Publons

Magnetism and anomalous transport in the Weyl semimetal PrAlGe: possible route to axial gauge fields
D. Destraz, L. Das, S.S. Tsirkin, Y. Xu, T. Neupert, J. Chang, A. Schilling, A.G. Grushin, J. Kohlbrecher, L. Keller, P. Puphal, E. Pomjakushina, and J.S. White
npj Quantum Materials 5, 5 (2020)

Topological magnetic phase in the candidate Weyl semimetal CeAlGe
P. Puphal, V. Pomjakushin, N. Kanazawa, V. Ukleev, D.J. Gawryluk, J.-Z. Ma, M. Naamneh, N.C. Plumb, L. Keller, R. Cubitt, E. Pomjakushina and, J.S. White
Phys. Rev. Lett. 124, 017202 (2020)

Multiple-q noncollinear magnetism in an itinerant hexagonal magnet
R. Takagi, J.S. White, S. Hayami, R. Arita, D. Honecker, H.M. Rønnow, Y. Tokura, and S. Seki
Science Advances, 4, eaau3402 (2018).

Disordered skyrmion phase stabilized by magnetic frustration in a chiral magnet
K. Karube †, J.S. White †, D. Morikawa, C.D. Dewhurst, R. Cubitt, A. Kikkawa, X.Z. Yu, Y. Tokunaga, T. Arima, H.M. Rønnow, Y. Tokura, and Y. Taguchi
Science Advances, 4, eaar7043 (2018).

Magnetoelectric inversion of domain patterns
N. Leo †, V. Carolus †, J.S. White, M. Kenzelmann, M. Hudl, P. Toledano, T. Honda, T. Kimura, S.A. Ivanov, M. Weil, Th. Lottermoser, D. Meier, and M. Fiebig
Nature 560, 466 (2018).

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).

Magnetic skyrmions at room temperature and far-from-equilibrium PSI Condensed Matter Colloquium, Paul Scherrer Institut, CH 24.01.2020
Multiple-q noncollinear magnetism in the itinerant hexagonal magnet Y3Co8Sn4 Contributed Talk, Topology in Magnetism: Theory Meets Experiment (TME) Workshop 2019, La Plata, Ar 22.10.2019
Multiple-q noncollinear magnetism in the itinerant hexagonal magnet Y3Co8Sn4 Contributed Talk, European Conference on Neutron Scattering (ECNS) 2019, Saint-Petersburg, RU 04.07.2019
Application of scattering techniques for the study of skyrmionics Lecture at FASEM School, Lund, SE 13.05.2019
Combining multiple order-parameters in multiferroics for new functionalities Keynote talk at ILL & ESS User Meeting, Grenoble, FR 11.10.2018
Introduction to neutron diffraction (from non-centrosymmetric magnets) Lecture at NTCM Summer School, EPFL, CH 24.08.2018
Disordered skyrmion phase stabilised by magnetic frustration in a chiral magnet Invited Seminar at Institut Néel, FR 21.06.2018
Disordered skyrmion phase stabilised by magnetic frustration in a chiral magnet Invited Seminar at Durham University, UK 16.05.2018
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

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, LIN, 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. E.M. Forgan, University of Birmingham, UK link
Dr. T. Honda, High Energy Accelerator Research Organization (KEK), Japan link
Prof. T. Kimura, Department of Applied Physics, University of Tokyo, Japan link
Dr. E. Pomjakushina, LMX, PSI link
Prof. H.M. Rønnow, Dr. I. Živković, LQM, EPF Lausanne 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
Laboratory for Neutron Scattering and Imaging (LNS)

Research with Neutrons and Muons (NUM)

Paul Scherrer Institut (PSI)