Current Research Interests
My research interests are in the investigation of quantum phase transitions (QPT), defined as phase transitions that are driven by quantum rather than thermal fluctuations. This area has attracted a great deal of interest in recent years due to the fact that quantum fluctuations dominate the physical properties of systems in the vicinity of a quantum critical point (QCP). This can result in non-Fermi-Liquid (NFL) behaviour, i.e. a strongly enhanced specific heat coefficient, non-quadratic temperature dependence of the electrical resistivity or in the formation of new ground states including unconventional superconductivity.
1) Scaling study and thermodynamic properties of the cubic helimagnet FeGe; Phys. Rev. B 94, 144424 (2016)
2) Phase diagram and magnetic relaxation phenomena in Cu2OSeO3, Phys. Rev. B 94, 064418 (2016)
3) Pressure-Induced Inhomogeneous Chiral-Spin Ground State in FeGe; Phys. Rev. Lett. 114, 016803 (2015)
4) Complex Chiral Modulations in FeGe Close to Magnetic Ordering; Phys. Rev. Lett. 110, 077207 (2013)
5) Confinement of chiral magnetic modulations in the precursor region of FeGe; J. Phys. Cond. Matter 24, 294204 (2012)
6) Precursor Phenomena at the Magnetic Ordering of the Cubic Helimagnet FeGe; Phys. Rev. Lett. 107, 127203 (2011)
7) Metallic State in Cubic FeGe Beyond Its Quantum Phase Transition; Phys. Rev. Lett. 98, 047204 (2007)
Heribert Wilhelm is Principal Beamline Scientist on the Extreme Conditions beamline I15 and Privat Docent in the Department of Condensed Matter Physics at the University of Geneva, Switzerland. His main interests are in the physics of strongly correlated electron systems and quantum phase transitions induced by pressure, chemical substitution or magnetic fields. The main challenge in this research is the combination of very sensitive measuring techniques and high pressure to study phase transitions at several hundred thousand atmospheres in the milli-Kelvin region.