Dr. Urs Staub

photo of Urs Staub Groupleader
Microscopy & Magnetism Group

Paul Scherrer Institute
WSLA/124
5232 Villigen PSI
Switzerland

Telephone: +41 56 310 4494
E-mail: urs.staub@psi.ch





ORCID: 0000-0003-2035-3367

CV

Name Urs Staub

Position Leader of the Magnetism and Microscopy Group in LSC complete publication list, dated 13.Feb 2019 / Senior Scientist and team leader of the RESOXS team / Operating a resonant soft x-ray diffractometer (RESOXS) at the SIM beamline.

Resonant soft x-ray scattering end station at the SIM beamline | P1010002.jpg |





Research Interests
  • Understanding strongly correlated electron systems on the microscopic level
Recent example: doubly chiral langasites
btfsstr1.png   btfsstr2.png   btfstdep.png
Crystal structure of chiral langasite (left), Magnetic butterfly structure of FE Langasites (middle), temperature dependence of the various Fouriercomponents of the magnetic odd satellites and associated orbital reconstructions (even satellites) obtained with resonant soft x-ray diffraction (right) Phys. Rev. B 95, 205145 (2017)



  • Metal Insulator transitions, including resistive switching effects
Recent example: Colossal magnetoresistance in (La/Pr/Ca)MnO3

| Fig 01.png | | Fig 07 Bdep v03.png | | Fig 10 PD v03.png Phase diagram of (La,Pr)1−xCaxMnO3 (with x ≈ 3/8),field dependence of the antiferromagnetic diffraction peak (taken with resonant soft x-ray diffraction) and the magnetization at various temperatures, updated phase diagram of (La,Pr)1−xCaxMnO3. Phys. Rev. B 94 214412 (2016)

  • Magnetic and electronic orderings and phase transitions
Example: Thin LuMnO3 films with E-type magnetic structures
Figure 1 LMO.jpg   Figure 2 LMO.jpg
Temperature dependence of the (0 q 0) magnetic reflection, temperature evolution of ordering wave vector for variously strained films. Phys. Rev. Lett. 113, 167202 (2014)



  • Interaction of magnetic, electric fields and electromagnetic radiation with condensed matter
Coherently exciting electromangons as a route to ultrafast switch magnetic/ferroelectric structures
spins-moving 3D cmyk nocat new final1 s.png 1242862fig2.png
Driving magnetic excitations with ultrafast electric field pulses (single cycle THz pulses) tracked with resonant magnetic soft x-ray diffraction from ultrashort x-ray pulses from the XFEL LCLS, Science 343,1333 (2014)

Examples: Writing magnetic domains with x-rays
Figure4New.jpg
Writing magnetic domains with X-rays in PCMO, Lateral sample scan with magnetic contrast through resonant magnetic soft x-ray scattering Phys. Rev. Lett 109 157203 (2012)



  • Ultrafast magnetization, electronic and lattice dynamics and dynamics of excited states
Recent examples: THz excitation of polar phonons, ultrafast demagnetisation of antiferromagnetic f and d moments in elemental Ho
motion Struct dyn.png FT Struct dyn.png
Moving atoms coherently by exciting polar modes in real time with single cycle THz pulses and tracking its motion by ultrafast x-ray diffraction at the XFEL (LCLS). Struct. Dyn. 4, 054301 (2017)
Fig1 V5.jpg Fig3 V5.jpg
Use of resonant dipole and quadrupole transitions to access to directly access the 4f and 5d magnetic moments in resonant hard x-ray magnetic scattering in the antiferromagnetic spiral of Ho metal. 4f and 5d moments show very similar magnetisation dynamics. Phys. Rev. Lett. 116, 257202 (2016)





Expertise in techniques:
  • Various resonant and non-resonant x-ray techniques, scattering, absorption, diffraction. This includes soft and hard x-ray regime and includes ultrafast time resolved experiments at XFEL facilities using diverse frequency ranges for the excitations: THz - UV.
  • Neutron scattering,


Education

Ph.D. supervised by Prof. Dr. A. Furrer (ETH & PSI). (9.1989 - 5.1993) Entitled: “Neutronenspektroskopische Untersuchung von Kristallfeld und Austauscheffekten an Hochtemperatursupraleitern”

Diploma Laboratory for Neutron Scattering (ETH & PSI) “Neutronenstreuung an Hochtemperatursupraleitern vom Typ RBa2Cu3O7-d, RBa2Cu4O8 (R=Seltene Erden) sowie deren Herstellung” supervised by Prof. Dr. A. Furrer. (1989)

Employment
Since 1.2013
Groupleader of the Microscopy and Magnetism Group (current size about 20 people)
Since 6.2007
Senior scientist at the Swiss Light Source, Paul Scherrer Institut heading the RESOXS team with currently three post-docs and two PhD student
6.1995 - 6.2007
Scientist at the Swiss Light Source, Paul Scherrer Institut heading the RESOXS team
12.1994 - 6.1995
Scientist at the Laboratory for Neutron Scattering, ETH & PSI.
6.1993 - 12.1994
Chemistry Division, Argonne National Laboratory, supervisor Dr. L. Soderholm. Swiss National Foundation fellowship and extension to maximum permitted term.


Teaching
  • ETH Lausanne (Physique des Materiaux III SS/2001)
PhD Thesis
  • T. Rossi, Charge carrier dynamics in metal oxides and hybrid lead perovskites investigated by time-resolved deep-UV and X-ray spectroscopy, 6.11.2018, EPFL Lausanne, committee
  • F. Thöle, Magnetoelectric multipoles in condensed-matter Systems, 24.8.2018, ETH Zürich, committee
  • N. Fedorova, First-Principle Study of Multiferroic Properties of Orthorhombic Perovskite Manganites, 23.5.2018, ETH Zürich, committee
  • M. Ramakrishnan, Investigation of Magnetoelectric Properties with X-rays, 11.9.2017, ETH Zürich, supervised
  • S. Muff, Manipulation of the Two-Dimensional States at Titanates Surfaces studied by ARPES, 26.7.2017, EPFL Lausanne, committee
  • Y. W. Windsor, Controlling Multiferroic Properties via Strain: an X-ray Diffraction and Absorption Study, 12.7.2016, ETH Zürich, supervised
  • T. Kubacka, Dynamics of coupled degrees of freedom in multiferroic TbMnO3, 25.5.2016, ETH Zürich, committee
  • M. Garganourakis, Electronic and Magnetic Ordering Phenomena in Multiferroic and Colossal Magnetoresistive Manganites”, 2.4.2013, ETH Zürich, supervised
  • B. P. Andreasson, “Oxygen Vacancies in SrTiO3: An X-ray Absorption Study”, 30.9.2009, ETH Zürich, supervised
  • M. García-Fernández, “Ordering Phenomena and Electronic Transitions in Co and Mn Based A-Site Ordered Perovskites”, 3.7.2009, ETH Zürich, supervised
  • J. Fernández Rodríguez, “Propedades electrónicas de materiales cristalinos observadas mediante difacción reonante de rayos X”, 09.2005, Oviedo, Spain, committee
  • V. Scagnoli, “Electronic and Magnetic Ordering Phenomena at Metal-Insulator Transitions Probed by Resonant X-Ray Scattering”, 12.2005, ETH Zürich, supervised

Publications

Author of more than 230 refereed publications complete publication list, dated 13.Feb 2019

Recent Highlights

TERAHERTZ-DRIVEN PHONON UPCONVERSION IN SrTiO3

M. Kozina, M. Fechner, P. Marsik, T. van Driel, J. M. Glownia, C. Bernhard, M. Radovic, D. Zhu, S. Bonetti, U. Staub and M. C. Hoffmann, Nature Phys. 15, xxx (2019). (Mar issue), DOI: 10.1038/s41567-018-0408-1

THE ULTRAFAST EINSTEIN–DE HAAS EFFECT

C. Dornes, Y. Acremann, M. Savoini, M. Kubli, M. J. Neugebauer, E. Abreu, L. Huber, G. Lantz, C. A. F. Vaz, H. Lemke, E. M. Bothschafter, M. Porer, V. Esposito, L. Rettig, M. Buzzi, A. Alberca, Y. W. Windsor, P. Beaud, U. Staub, Diling Zhu, Sanghoon Song, J. M. Glownia & S. L. Johnson, Nature 565, 209 (2019).

ULTRAFAST RELAXATION DYNAMICS OF THE ANTIFERRODISTORTIVE PHASE IN Ca DOPED SrTiO3

M. Porer, M. Fechner, E. Bothschafter, L. Rettig, M. Savoini, V. Esposito, J. Rittmann, M. Kubli, M. J. Neugebauer, E. Abreu, T. Kubacka, T. Huber, G. Lantz, S. Parchenko, S. Grü bel, A. Paarmann, Noack, P. Beaud, G. Ingold, U. Aschauer, S. L. Johnson, and U. Staub, Phys. Rev. Lett. 121, 055701 (2018).

NONLINEAR ELECTRON-PHONON COUPLING IN DOPED MANGANITES

V. Esposito, M. Fechner, R. Mankowsky, H. Lemke, M. Chollet, J.M. Glownia, M. Nakamura, M. Kawasaki, Y. Tokura, U. Staub, P. Beaud, and M. Först, Phys. Rev. Lett. 118, 247601 (2017).

ITINERANT AND LOCALIZED MAGNETIZATION DYNAMICS IN ANTIFERROMAGNETIC Ho

L. Rettig, C. Dornes, N. Thielemann-Kühn, N. Pontius, H. Zabel, D. L. Schlagel, T. A. Lograsso, M. Chollet, A. Robert, M. Sikorski, S. Song, J. M. Glownia, C. Schüßler-Langeheine, S. L. Johnson, and U. Staub, Phys. Rev. Lett. 116, 257202 (2016).

ULTRAFAST STRUCTURAL DYNAMICS OF THE Fe-PNICTIDE PARENT COMPOUND BaFe2As2

L. Rettig, S. O. Mariager, A. Ferrer, S. Grübel, J. A. Johnson, J. Rittmann, T. Wolf, S. L. Johnson, G. Ingold, P. Beaud, and U. Staub, Phys. Rev. Lett. 114, 067402 (2015).

A TIME-DEPENDENT ORDER PARAMETER FOR ULTRAFAST PHOTO-INDUCED PHASE TRANSITIONS

P. Beaud, A. Caviezel, S. O. Mariager, L. Rettig, G. Ingold, C. Dornes, S-W. Huang, J. A. Johnson, M. Radovic, T. Huber, T. Kubacka, A. Ferrer, H. T. Lemke, M. Chollet, D. Zhu, J. M. Glownia, M. Sikorski, A. Robert, H. Wadati, M. Nakamura, M. Kawasaki, Y. Tokura, S. L. Johnson, and U. Staub, Nature Mater., 13, 923 (2014).

LARGE AMPLITUDE SPIN DYNAMICS DRIVEN BY A THz PULSE IN RESONANCE WITH AN ELECTROMAGNON

T. Kubacka, J.A. Johnson, M.C. Hoffmann, C. Vicario, S. de Jong, P. Beaud, S. Grübel, S-W. Huang, L. Huber, L. Patthey, Y-D. Chuang, J.J. Turner, G.L. Dakovski, W-S. Lee, M.P. Minitti, W. Schlotter, R.G. Moore, C.P. Hauri, S.M. Koohpayeh, V. Scagnoli, G. Ingold, S.L. Johnson and U. Staub, Science 343,1333 (2014)

MULTIFERROIC PROPERTIES OF o-LuMnO3 CONTROLLED BY B-AXIS STRAIN

Y. W. Windsor, S. W. Huang, Y. Hu, L. Rettig, A. Alberca, K. Shimamoto, V. Scagnoli T. Lippert, C. W. Schneider, and U. Staub, Phys. Rev. Lett. 113, 167202 (2014).

OBSERVATION OF ORBITAL CURRENTS IN CuO

V. Scagnoli, U. Staub, Y. Bodenthin, R. A. de Souza, M. Garcia-Fernandez, M. Garganourakis, A. T. Boothroyd, D. Prabhakaran, and S. W. Lovesey, Science 332, 696 (2011).

Memberships

Committees
  • Member of the Proposal Review Panel of ALBA (2016 –
  • Member of the Scientific Advisory Board (SAC) of synchrotron SOLEIL (2014 -–
  • Member of the Proposal Review Panel of HZB (BESSY) (2014 –-2018)
  • Member of scientific committee of NCCR MaNEP (Phase III 7/2009 -7/2013)
  • Member of the Proposal Review Panel of the free electron laser facility FLASH in Hamburg (2009 - 2015)
  • Member of PSI’s research committee (2002 - 2010)
  • Member of the executive board of the Swiss Physical Society (representative for condensed matter physics) 31.3.2008 - 6.2012
National and International Research Activities
  • Member of MUST phase II/III, start 7/2014, (Molecular Ultrafast Science and Technology), a NCCR program of the Swiss National Science Foundation
  • Member of the MaNEP in phase III, 6.2009- 6.2013, (Materials with Novel Electronic Properties), a NCCR program of the Swiss National Science Foundation
  • Joint Research Project Agreements with IBM Research GmbH, Zürich Research Laboratory, 8803 Rüschlikon, Switzerland
  • Member of the Quantum Magnetic Materials Research Team, RIKEN Harima Institute, located at SPring-8, Japan (1.12. 2001 - 1.4. 2007)