  How ground states of quantum matter transform between one another reveals
deep insights into the mechanisms stabilizing them. Correspondingly, quantum
phase transitions are explored in numerous materials classes, with heavy
fermion compounds being among the most prominent ones. Recent studies in an
anisotropic heavy fermion compound have shown that different types of
transitions are induced by variations of chemical or external pressure [1-3],
raising the question of the extent to which heavy fermion quantum criticality
is universal. To make progress, it is essential to broaden both the materials
basis and the microscopic parameter variety. Here, we identify a cubic heavy
fermion material as exhibiting a field-induced quantum phase transition, and
show how the material can be used to explore one extreme of the dimensionality
axis. The transition between two different ordered phases is accompanied by an
abrupt change of Fermi surface, reminiscent of what happens across the
field-induced antiferromagnetic to paramagnetic transition in the anisotropic
YbRh2Si2. This finding leads to a materials-based global phase diagram -- a
precondition for a unified theoretical description.
