Yoav Tsori

An alternative mechanism explaining structural changes in polarized media such as diblock copolymers is proposed. The mechanism is based on the interaction of free charges with an external field rather than on the tendency to reduce dielectric interfaces perpendicular to the field. Calculation of the deformation of the bcc phase of diblock copolymers using the dielectric mechanism only, show that the critical field for transition to a hexagonal phase is E_c≈70 V/μm.