要旨：In the introduction, I will briefly explain recent improvements in the technique of modulation calorimetry which allows ultra high sensitivity and provides a new tool for fermiology and the study of quantum oscillations.
Thereafter I will illustrate these new possibilities in 3 different cases : the (ultra) quantum limit of graphite, the search for chargeless fermions in Kondo insulators, and the exotic superconductivity in UTe2.
