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György 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 (later the beamline moved to ID20 during the ESRF Upgrade). 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 involved also in time-resolved studies to exploit the novel research opportunities at X-ray Free Electron Lasers. The group has been slowly but steadily growing, and has been developing ultrafast X-ray and optical probes to study the electronic and structural dynamics on fs to ps time scales.
Research
- 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
- Femtosecond-resolved spectroscopies to study the photophysics and photochemistry of molecular systems in solutions
- Application of X-ray spectroscopy probes in pump-probe experiments
Publication list