Seminarium Instytutu Niskich Temperatur i Badań Strukturalnych PAN
Audytorium INTiBS PAN, ul. Okólna 2
Exploring Novel Quantum Phases under Extreme Conditions
dr Yukako Fujishiro
RIKEN ECL Research Unit Leader, Frontier Research Laboratory, Japan
The exploration of emergent quantum phenomena under extreme conditions—such as ultra-high pressure, low temperature, and intense electromagnetic fields—offers a powerful pathway to discovering new states of matter and exotic electronic properties. In this presentation, I will introduce our recent efforts to design and probe quantum materials using focused ion beam (FIB)-fabricated microdevices as a versatile experimental platform.
By integrating FIB techniques with diamond anvil cells (DACs), we have realized high-precision transport measurements up to 50 GPa, revealing pressure induced quantum phase transitions of chiral and topological spin textures, as well as the emergence of novel correlated electronic states.
Furthermore, by leveraging advanced FIB microstructuring, we are extending this approach to topological semimetals, particularly magnetic Weyl semimetals. I will highlight our recent progress on Li intercalation and the resulting gigantic carrier density control, current-induced magnetization dynamics and emergent electromagnetic induction, and switchable nonreciprocity in nanosculpted three-dimensional helices. These results showcase the unique interplay between topology and
transport that cannot be accessed in as-grown crystals.
Together, these studies demonstrate how microdevice-based extreme environment experiments can open new frontiers in controlling and understanding strongly correlated and topological quantum phases.
