Dr. Jakub Vonka

Jakub Vonka is a tenure-track scientist within the Quantum Photon Science group. He did his B.Sc and M.Sc in the Institute of Physical Engineering at Brno University of Technology. During his studies, he worked at the Institute of Scientific Instruments of Czech Academy of Sciences to develop an ultra-high vacuum-compatible ⁴Heflow cryostat for a scanning tunneling microscope. He obtained his PhD for research done in the Ultra Low Temperature group at Lancaster University in the UK. Namely, he studied the dissipation from an object moving through the superfluid condensate in the ballistic quasiparticle limit and the demagnetisation of solid ³He formed on the surfaces of aerogel. He then joined PSI as a post-doc on a cross-divisional position shared between the Quantum Technologies Group and the Sample Environment Group to develop novel instrumentation to allow X-ray scattering experiments at ultra-low temperatures and high magnetic fields. He is currently involved in realization and commissioning of a third experimental station on the SwissFEL hard X-ray beamline ARAMIS, dedicated to the study of quantum matter under extreme conditions and to protein crystallography.

The research work of Jakub Vonka is focused developing novel methods to allow photon-based inspection of condensed matter systems under extreme conditions. The systems studied exhibit various physical phenomena such as high temperature superconductivity, quantum criticality and quantum magnetism.

Magnetotransport of dirty-limit van Hove singularity quasiparticles.
Xu, Y., Herman, F., Granata, V., Destraz, D., Das, L., Vonka, J., Gerber, S., Spring, J., Gibert, M., Schilling, A. and Zhang, X.
Commun Phys 4, 1 (2021)

Effect of boundary condition on Kapitza resistance between superfluid He-B and sintered metal.
Autti, S., A. M. Guénault, R. P. Haley, A. Jennings, G. R. Pickett, R. Schanen, A. A. Soldatov, V. Tsepelin, J. Vonka, and D. E. Zmeev.
Physical Review B, 102(6), 064508. (2020)

Fundamental dissipation due to bound fermions in the zero-temperature limit.
Autti, S., R. P. Haley, A. Jennings, G. R. Pickett, R. Schanen, A. A. Soldatov, V. Tsepelin, J. Vonka, T. Wilcox, and D. E. Zmeev
Nat Commun 11, 4742 (2020)

Acoustic damping of quartz tuning forks in normal and superfluid He3.
Guénault, A.M., Haley, R.P., Kafanov, S., Noble, M.T., Pickett, G.R., Poole, M., Schanen, R., Tsepelin, V., Vonka, J., Wilcox, T. and Zmeev, D.E.
Physical Review B, 100(10), 104526. (2019)

Probing Liquid 4He with Quartz Tuning Forks Using a Novel Multifrequency Lock-in Technique.
Bradley, D.I., Haley, R.P., Kafanov, S., Noble, M.T., Pickett, G.R., Tsepelin, V., Vonka, J., & Wilcox, T.
Journal of Low Temperature Physics, 184(5-6), 1080–1091. (2016)

Low conductive support for thermal insulation of a sample holder of a variable temperature scanning tunneling microscope.
Hanzelka P., Vonka J., & Musilova V.
Review of Scientific Instruments, 84(8), 085103. (2013)

Thermal conductivity of a Cu-CrZr alloy from 5K to room temperatures.
Hanzelka, P., Musilova V., Kralik T., & Vonka J.
Cryogenics, 50(11), 737–742. (2015)