Vankó, György



Phone: +36 1 392-22-22 ext.: 1736
Fax:     +36 1 395-91-51
email: vanko (at) rmki.kfki.hu

Mr. Vankó has recorded hundreds of Mössbauer spectra in the laboratory of Prof. Attila Vértes, at the Eötvös University, Budapest, to receive his PhD. During this time he amused himself with learning other techniques, which opened his eyes to synchrotron radiation facilities. The enthusiast and (that time) young fellow seeked a postdoc position at the ESRF, where he later became a beamline scientist on the Inelastic Scattering Beamline ID16. After almost seven years at the ESRF, he managed to become a user and returned to his home country, with the intension of building an X-ray spectroscopy group. The group is slowly growing, and makes efforts to get more and more involved in studying electronic and structural dynamics on the fs to ps time scales.

created at TagCrowd.com

Eötvös Loránd University, Budapest, Hungary
Laboratory of Nuclear Chemistry

1993 M.Sc.

2000 Ph.D.

  • Mössbauer spectroscopies (absorption, emission, time-differential, CEMS)
  • X-ray powder diffraction, IR and UV-VIS spectroscopies
  • ab initio calculations (molecular systems)
  • positron annihilation lifetime spectroscopy
  • 1998 – nuclear resonance scattering of synchrotron radiation
Fellowships,
Honours

1989-1994 Member of the Eötvös Collegium (fondé après l'École Normal Superieure)
1993-1996 TMB research fellow
1996 Hungarian State Eötvös Fellow
2001 Young Scientist Prize of the HAS

European Synchrotron Radiation Facility, Grenoble, France
Inelastic Scattering Beamline ID16

2001-2002 postdoc
2002-2007
beamline scientist
Inelastic X-ray Scattering
on electronic excitations
Electronic multistability
Spin-state transitions
Valence transitions
Extreme conditions
Molecular compounds
Correlated oxides

Wigner Research Centre for Physics, Hungarian Academy of Sciences
(from January 2012; till Dec. 2011:)
KFKI Research Institute for Particle and Nuclear Physics, Budapest, Hungary

2007- senior research fellow
High-resolution X-ray spectroscopy
with synchrotron radiation
Time-resolved X-ray spectroscopy
with ps and fs time resolution
Mössbauer emission spectroscopy
Spin-state switching
Metal-insulator transitions
Functional molecules
Correlated oxides

2007-2010 Bolyai János Research Fellowship
2009 Rezső Schmid Prize of the Roland Eötvös Physical Society
2010-2015 ERC Starting Grant
2011 Bolyai Plaquette
2013 MTA Lendület (Momentum) Programme

  • High-resolution X-ray spectroscopy
  • Electronic bistability
  • Ultrafast studies

High-resolution X-ray spectroscopy

  • Overview of the techniques
    or what can you do with a crystal spectrometer at a synchrotron radiation source?
    The answer includes non-resonant inelastic X-ray scattering (NR-IXS), a photon energy loss spectroscopy with controlled momentum transfer, resonant inelastic X-ray scattering (RIXS), X-ray emission spectroscopy (XES), X-ray absorption spectroscopy (XAS), and resonant X-ray emission spectroscopy (RXES)
    Quite a bit;)
  • Improving the resolution of crystal spectrometers,
    or how to measure phonons with a 1m arm Raman spectrometer?
    Read it here:
    S. Huotari, G. Vankó et al., ESRF Highlights 2005
    or in this news spotlight
  • Determination of the spin state of 3d transition metal compounds from X-ray emission (XES)
    G. Vankó et al., ESRF Highlights 2002

    How to get quantitative on the spin momentum from XES ("the IAD approach"):
    G. Vankó et al., J. Phys. Chem. B 110 (2006) 11647--11653.

  • Unravelling details of 1s X-ray absorption pre-edges
    Improved resolution
    Interference between the absorption and emission channels in 1s2p RXES
    Non-local (or off-site) transitions in the pre-edge region

Electronic bistability

  • Spin-state transitions in transition metal complexes
  • Metal-insulator transitions in transition metal oxides

Ultrafast studies

  • Application of X-ray spectroscopy probes in pump-probe experiments (so far)
    coauthor of 111 scientific papers, cited 2222 times (August 2016)
    guest editor to 2 journal volumes
    My ResearcherID profile
For those speaking Hungarian,
a chapter on X-ray spectroscopy:
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