第47回:1月12日(土)15:00から
京大工学部8号館3階南演習室
Stefano Ruffo(Univ. of Florence)
『Long-Range Effects in Layered Spin Structures』
We study theoretically layered spin systems where long-range
dipolar interactions play a relevant role. By choosing a specific
sample shape, we are able to reduce the complex Hamiltonian of the
system to that of a much simpler coupled rotator model with
short-range and mean-field interactions. This latter model has
been studied in the past because of its interesting dynamical and
statistical properties related to exotic features of long-range
interactions. It is suggested that experiments could be conducted
such that within a specific temperature range the presence of
long-range interactions crucially affects the behavior of the
system.
Reference paper: A. Campa, R. Khomeriki, D. Mukamel and S. Ruffo,
Phys. Rev. B, 76, 064415 (2007).
Last modified: Fri Jan 4 10:45:19 2008