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Tuesday, June 20, 2006
1:30 PM - 2:00 PM
CNLS Conference Room

Seminar

Realizing Colloidal Spin Ice on Arrays of Optical Traps

Andras Libal
University of Notre Dame / LANL

We demonstrate how a colloidal version of a spin ice and other frustrated configurations can be realized on optical trap lattices. Using numerical simulations, we show that this system obeys the ice rules and that for strong colloid-colloid interactions, an ordered ground state appears. Further, we illustrate that this system can also be used to explore various other types of ordered and frustrated systems with different lattice geometries, such as a honeycomb lattice which prevents the formation of a long-range ordered ground state. Joint work with: C. Reichhardt, C.J. Olson Reichhardt (cond-mat/0603265)

Host: Cynthia Reichhardt, T-12