Condensed Matter Physics Seminar

Long range interactions at work: the stripe glass and the dislocation glass

Prof. Gergely Zimany
University of California, Davis
Thursday, April 19, 2007
Higgins 235, 3pm

Long range interactions can introduce frustration without any quenched randomness. In dislocation systems the logarithmic interaction has a dipole prefactor, changing sign depending on the relative orientation of the dislocations, giving rise to a dislocation glass. In perpendicularly magnetized films the dipolar interaction is antiferromagnetic, i.e. the triangle of any three spins is frustrated, resulting in a stripe glass. We analyze these two models with the concepts of modern glass physics. We analyze the aging behavior of the models through various correlation functions. We also identify growing length scales associated with spatial inhomogeneities.