Abstract. The paper analyzes the changes in electronic states of a layered crystal caused by shear deformation of layers under action of the force consisting of both constant and harmonic components. It is shown that such deformation can change the component of lattice spacing by the magnitude of one layer thickness. In the frame of adiabatic approximation of the perturbation theory it is calculated the electronic states, whose degeneracy is removed by deformation perturbation, as well as the time moments of realization of degeneracy removal.
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