  We report a significant Dzyaloshinskii-Moriya interaction (DMI) and
perpendicular magnetic anisotropy (PMA) at interfaces comprising hexagonal
boron nitride (h-BN) and Co. By comparing the behavior of these phenomena at
graphene/Co and h-BN/Co interfaces, it is found that the DMI in latter
increases as a function of Co thickness and beyond three monolayers stabilizes
with one order of magnitude larger values compared to those at graphene/Co,
where the DMI shows opposite decreasing behavior. At the same time, the PMA for
both systems shows similar trends with larger values for graphene/Co and no
significant variations for all thickness ranges of Co. Furthermore, using
micromagnetic simulations we demonstrate that such significant DMI and PMA
values remaining stable over large range of Co thickness give rise to formation
of skyrmions with small applied external fields in the range of 200-250 mT up
to 100 K temperatures. These findings open up further possibilities towards
integrating two-dimensional (2D) materials in spin-orbitronics devices.
