  The interlayer coupling, which has a strong influence on the properties of
van der Waals heterostructures, strongly depends on the interlayer distance.
Although considerable theoretical interest has been demonstrated, experiments
exploiting a variable interlayer coupling on nanocircuits are scarce due to the
experimental difficulties. Here, we demonstrate a novel method to tune the
interlayer coupling using hydrostatic pressure by incorporating van der Waals
heterostructure based nanocircuits in piston-cylinder hydrostatic pressure
cells with a dedicated sample holder design. This technique opens the way to
conduct transport measurements on nanodevices under pressure using up to 12
contacts without constraints on the sample at fabrication level. Using
transport measurements, we demonstrate that hexagonal boron nitride capping
layer provides a good protection of van der Waals heterostructures from the
influence of the pressure medium, and we show experimental evidence of the
influence of pressure on the interlayer coupling using weak localization
measurements on a TMDC/graphene heterostructure.
