Effects of dislocations on the stiffness of charge density waves with a 3-dimensional order was studied by using the Ginzburg–Landau theory of charge density waves. Attention was concentrated on the motion of the dislocation along the conducting chains of charge density waves. The Peierls potential, which was a periodic potential felt by the dislocations in a crystal and works so as to preserve the stiffness of the crystal by suppressing the dislocation motion, was estimated for the case of charge density waves. It was shown that the Peierls potential was vanishingly small in most charge density wave systems. This indicated the possibility of the softening of charge density waves in the presence of dislocations, which may be important in understanding the experimentally observed field effect on charge density wave transport.

Effects of Dislocations on the Stiffness of Charge Density Wave. M.Hayashi: Physica B, 2002, 324[1-4], 82-9