2D van der Waals crystals, a class of materials that
exhibit strong in-plane covalent bonds and weak interlayer
interactions, have recently become the focus of numerous research
studies due to their plethora of unique electrical, optical, and
mechanical properties. Curiously, when a hybrid vertical stacking
of different sheets of van der Waals crystals is assembled, it
gains new properties absent from any of its constituent
layers.