Thermal fluctuations and disorder effects in vortex lattices

Abstract

We calculate using loop expansion the effect of fluctuations on the structure function and magnetization of the vortex lattice and compare it with existing Monte Carlo results. In addition to renormalization of the height of the Bragg peaks of the structure function, there appear characteristic saddle shape "halos" around the peaks. The effect of disorder on magnetization is also calculated. All the infrared divergencies related to soft shear cancel. [S0163-1829(99)11837-X].