Quantum criticality in itinerant ferromagnets
Elena Gati
MPI-CFPS Dresden
In this talk, I will review the recent technical progress in studying quantum materials under pressure and highlight how these advances path the way for making new discoveries in the field. In doing so, I will discuss the case of quantum criticality in itinerant ferromagnets in more detail. Specifically, I will focus on pressure experiments on two ferromagnets, LaCrGe3 and La5Co2Ge3, where the moment originates from the transition-metal site and is highly itinerant. In both materials, the ferromagnetic quantum criticality is avoided by the emergence of a distinct magnetic phase. I will discuss what is known about the nature of these novel phases and how these results fit into the current theoretical understanding of avoided ferromagnetic criticality in metals. At the end of the talk, I will comment on promising future directions for tuning quantum materials by pressure.