  The discovery of two-dimensional (2D) van der Waals (vdW) materials often
provides interesting playgrounds to explore novel phenomena. One of the missing
components in 2D vdW materials is the intrinsic heavy-fermion systems, which
can provide an additional degree of freedom to study quantum critical point
(QCP), unconventional superconductivity, and emergent phenomena in vdW
heterostructures. Here, we investigate 2D vdW heavy-fermion candidates through
the database of experimentally known compounds based on dynamical mean-field
theory calculation combined with density functional theory (DFT+DMFT). We have
found that the Kondo resonance state of CeSiI does not change upon exfoliation
and can be easily controlled by strain and surface doping. Our result indicates
that CeSiI is an ideal 2D vdW heavy-fermion material and the quantum critical
point can be identified by external perturbations.
