Quantum Materials with Anisotropic Heavy Fermions

Quantum materials are materials with strong electronic correlation and emergent orders.

In this research project we will experimentally study quantum materials in systems with strongly anisotropic properties, including heavy-fermion systems with purported quantum criticality, quantum spin liquids, and Fulde–Ferrell–Larkin–Ovchinnikov (FFLO) phases.

For the studies, we will apply our experimental technique of ultra-small sample specific heat measurements to investigate single crystals of such quantum materials at low temperatures (down to 10 mK) and high magnetic fields (45 T and beyond) with sample rotation.

The technique, that we have been developing for many years, is now fully ready to firmly establish its place as a key materials characterization method in strong magnetic fields. The theoretical understanding of strongly correlated systems is a great challenge. Theoretical frameworks of quantum criticality and heavy fermions are not easily reconciled with each other.

Each new material also brings additional puzzling observations.

High-quality thermodynamic characterization is a key component for assisting this theoretical understanding and development.