  A new concept of an electromechanical nanodynamometer based on the relative
displacement of layers of bilayer graphene is proposed. In this
nanodynamometer, force acting on one of the graphene layers causes the relative
displacement of this layer and related change of conductance between the
layers. Such a force can be determined by measurements of the tunneling
conductance between the layers. Dependences of the interlayer interaction
energy and the conductance between the graphene layers on their relative
position are calculated within the first-principles approach corrected for van
der Waals interactions and the Bardeen method, respectively. The
characteristics of the nanodynamometer are determined and its possible
applications are discussed.
