TILT EFFECT IN THE ELECTRON DRAG OF DISLOCATIONS IN METALS

We study the electron drag force acting on a moving dislocation in the presence of strong magnetic field H. We show that the drag force has a sharp minimum phi = 0, where phi is an angle between the dislocation axis and H. The typical width of the minimum is of the order of phi(c ) = V/v(F) (V is the velocity of dislocation and v(F) is the Fermi vel ocity). The minimum is due to the compensation of the deformation and electromagnetic contributions to the electron-dislocation interaction. For phi > phi(c) compensation does not take place and the drag force increases linearly with increasing H. This form of the angular depende nce of the drag force is in a qualitative agreement with recent experi mental data.